PTO Manual of Classification for US patents

PTO Manual of Classification for US patents

What follows are the subclasses from one class of the Manual of Classification for US patents. As you scroll through the list and encounter a class/subclass of interest, you can jump back to the top and retrieve patent titles by entering the class/subclass in the box below.


Enter a class/subclass code here to get a list of patent titles. Use any of the following forms:
363-131 121-55A 14-.5
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Class Number: 428
 Class Title: STOCK MATERIAL OR MISCELLANEOUS ARTICLES

Subclass  Subclass
Number    Title

  1       LIQUID CRYSTAL
  3       RELIGIOUS ARTIFACT (E.G., CRUCIFORM, ETC.)
  4       BOW, POMPOM OR ROSETTE
  5       .Looped type
  6       PLUME
  7       SPECIAL OCCASION ORNAMENT
  8       .Knockdown
  9       .Collapsible
  10      .Wreath type
  11      .Ball, bell, or star-shaped
  12      COLLAPSIBLE ARTICLE (E.G., JOINTED, ELASTIC, ETC.)
  13      DISPLAY IN FRAME OR TRANSPARENT CASING; OR DIORAMA INCLUDING OR
           IMITATIVE OF A REAL OBJECT
  14      .Peripheral enclosure or frame
  15      THREE DIMENSION IMITATION OR "TREATED" NATURAL PRODUCT
  16      .Fauna
  17      .Flora
  18      ..Tree
  19      ...With article holder or ornament
  20      ...Knockdown
  21      ..Artificial fruit or garnishing leaf display strip
  22      ..Including naturally occurring article
  23      ..Cluster or with holder
  24      ..Flower or flower petal
  25      ...Of filamentary or filamentary-openwork type
  26      ...Of cloth, paper, or chemically plastic matter
  27      ..Framework with or therefor
  28      FINIAL OR PENDANT TYPE ARTICLE
  29      ARTICLE HAVING LATENT IMAGE OR TRANSFORMATION
  30      .Striated for iridescence
  31      VEHICLE BODY ORNAMENT
  544     ALL METAL OR WITH ADJACENT METALS
  545     .Component of composite having metal continuous phase
            interengaged with nonmetal continuous phase
  546     .Having metal particles
  547     ..Having composition or density gradient or differential
             porosity
  548     ..Composite, i.e., plural, adjacent, spatially distinct metal
             components, e.g., layers, etc.
  549     ...Fiber, asbestos, or cellulose in or next to particulate
              component
  550     ...Porous component
  551     ...Nonmetal component
  552     ....Entirely inorganic
  553     ...Nonparticulate metal component
  554     ....Plural nonparticulate metal components
  555     .....Next to each other
  556     ......Nonmetal in particulate component
  557     ....Plural particulate metal components
  558     ....Nonparticulate component encloses particles
  559     ....Particles discontinuous
  560     .....Separated by nonmetal matrix or binder, e.g., weldingg
                electrode, etc.
  561     ......Nonparticulate component has Ni-, Cu-, or Zn-base
  562     ......Nonparticulate component has Fe-base
  563     .......Next to Fe-containing particles
  564     ....Nonmetal particles in particulate component
  565     ...Nonmetal particles in a component
  566     ..Interconnected void structure, e.g., permeable, etc.
  567     ..Continuous interengaged phases of plural metals, or oriented
             fiber containing
  568     ...Nonmetal containing
  569     ...Mo or W containing
  570     .Composite powder, e.g., coated, etc.
  571     .Having marginal feature for indexing or weakened portion for
            severing
  572     ..For severing perpendicular to longitudinal dimension
  573     .Width or thickness variation or marginal cuts repeating
            longitudinally
  574     ..Variation in both width and thickness
  575     ..Marginal slots, i.e., deeper than wide
  576     .Shaped configuration for melting, e.g., package, etc.
  577     .Intermediate article, e.g., blank, etc.
  578     ..Panel having nonrectangular perimeter
  579     ...Disk
  580     ...Symmetrical
  581     ....Only one plane of symmetry
  582     ..Having outward flange, gripping means or interlocking feature
  583     ..Having discrete fastener, marginal fastening, taper, or end
             structure
  584     ...Same structure at both ends of plural taper
  585     ...Single taper, e.g., ingot, etc.
  586     .Workpiece with longitudinal passageway or stopweld material,
            e.g., for tubular stock, etc.
  587     .Workpiece mimicking finished stock having nonrectangular or
            noncircular cross section
  588     .Workpiece of parallel, nonfastened components, e.g., fagot,
            pile, etc.
  589     ..Arranged to avoid lateral displacement
  590     ..Composite
  591     .With provision for limited relative movement between
            components
  592     .Helical or with helical component
  593     .Honeycomb, or with grain orientation or elongated elements in
            defined angular relationship in respective components, e.g.,
            parallel, intersecting, etc.
  594     .Plural layers discontinuously bonded, e.g., spot-weld,
            mechanical fastener, etc.
  595     .Nonplanar, uniform-thickness material having symmetrical
            channel shape or reverse fold, e.g., making acute angle, etc.
  596     .Having aperture or cut
  597     ..Struck-out portion type
  598     .Having member which crosses the plane of another member, e.g.,
            T or X cross section, etc.
  599     .Defined configuration of both thickness and nonthickness
            surface or angle therebetween, e.g., rounded corners, etc.
  600     .Having variation in thickness
  601     ..Discontinuous surface component
  602     ..Longitudinally smooth and symmetrical
  603     .Nonplanar uniform thickness or nonlinear uniform diameter,,
            e.g., L-shape
  604     ..Intersecting corrugations or dimples not in a single line,
             e.g., waffle form, etc.
  605     .Mass of only fibers
  606     .Foil or filament smaller than 6 mils
  607     ..Composite
  608     .Embodying fibers, interengaged or between layers, e.g., paper,
            etc.
  609     .Macroscopically anomalous interface between layers
  610     .Having composition, density, or hardness gradient
  611     .Having magnetic properties, or preformed fiber orientation
            coordinate with shape
  612     .Microscopic interfacial wave or roughness
  613     .Porous, e.g., foamed, spongy, cracked, etc.
  614     .Laterally noncoextensive components, e.g., embedded, etc.
  615     .Composite, i.e., plural, adjacent, spatially distinct metal
            components, e.g., layers, joint, etc.
  616     ..Deflectable by temperture change, e.g., thermostat element
  617     ...More than two components
  618     ...One component Cu-based
  619     ...Both components Fe-based with more than 10% Ni
  620     ..Semiconductor component
  621     ..With additional, spatially distinct nonmetal component
  622     ...More than one such component
  623     ....Adjacent to each other
  624     ...Organic component
  625     ....Elastomer
  626     ....Synthetic resin
  627     ...Boride, carbide or nitride component
  628     ...Component contains compound of adjacent metal
  629     ....Oxide
  630     ...Noncrystalline silica or noncrystalline plural-oxide
              component, e.g., glass, etc.
  631     ....Film, e.g., glaze, etc.
  632     ...Oxide-containing component
  633     ....Plural oxides
  634     ...Free carbon containing component
  635     ..Four or more distinct components with alternate recurrence of
             each type component
  636     ..Adjacent, identical composition, components
  637     ...Group VIII or IB metal-base
  638     ....Fe, containing 0.01-1.7% carbon, i.e., steel
  639     ..O, S, or organic compound in metal component
  640     ...Oxide of transition metal or Al
  641     ..Ge- or Si-base component
  642     ..Ga-, In-, Tl- or Group VA metal-base component
  643     ..Pb- and Sn-base components: alternative to or next to each
             other*
  644     ...And next to Cu- or Fe-base component
  645     ..Pb-base component
  646     ..Sn-base component
  647     ...Next to Group IB metal-base component
  648     ...Next to Group VIII metal-base component
  649     ..Group IIA metal-base component
  650     ..Al-base component
  651     ...Next to refractory (Group IVB, VB, or VIB) metal-base
              component
  652     ...Next to Group VIII or IB metal-base componentt
  653     ....Fe
  654     ...Next to Al-base component
  655     ..Transition metal-base component
  656     ...Alternative base metals from diverse categories*
  657     ...Group IIB metal-base component
  658     ....Zn-base component
  659     .....Next to Fe-base component, e.g., galvanized
  660     ...Refractory (Group IVB, VB, or VIB) metal-base component
  661     ....Diverse refractory group metal-base components: alternative
               to or next to each other*
  662     ....Group VB metal-base component
  663     ....Group VIB metal-base component
  664     .....Alternative to or next to each other*
  665     .....W-base component
  666     .....Cr-base component
  667     ......Next to Co-, Fe-, or Ni-base component
  668     ...Group VIII or IB metal-base component
  669     ....Group IB metal-base component alternative to platinum group
               metal-base component, e.g., precious metal, etc.*
  670     ....Platinum group metal-base component
  671     ....Cu-base component alternative to Ag-, Au-, or Ni-base
               component*
  672     ....Au-base component
  673     ....Ag-base component
  674     ....Cu-base component
  675     .....Next to Co-, Cu-, or Ni-base component
  676     .....Next to Fe-base component
  677     ......Fe-base has 0.01-1.7% carbon, i.e., steel
  678     ....Co-, Fe-, or Ni-base components, alternative to each other*
  679     ....Co- or Ni-base component next to Fe-base component
  680     ....Ni-base component
  681     ....Fe-base component
  682     .....Next to Fe-base component
  683     ......Both containing 0.01-1.7% carbon, i.e., steel
  684     .....Containing 0.01-1.7% carbon, i.e., steel
  685     ......Containing more than 10% nonferrous elements, e.g., high
                 alloy, stainless
  686     ..Adjacent functionally defined components
  687     .Surface feature, e.g., rough, mirror
  2       COMPACTED TRASH OR REFUSE BUNDLE
  32      ARTICLE HAVING ORNAMENTAL WOUND OR WOVEN STRANDS
  33      PLURAL PARTS WITH EDGES OR TEMPORARY JOINING MEANS EACH
           COMPLEMENTARY TO OTHER
  34      LIGHT TRANSMISSIVE SHEETS, WITH GAS SPACE THEREBETWEEN AND EDGE
           SEALED (E.G., DOUBLE GLAZED STORM WINDOW, ETC.)
  34.1    HOLLOW OR CONTAINER TYPE ARTICLE (E.G., TUBE, VASE, ETC.)
  34.2    .Paper containing (e.g., paperboard, cardboard, fiberboard,
            etc.)
  34.3    ..Bag or tubular film (e.g., pouch, flexible food casing,
             envelope, etc.)
  34.4    .Glass, ceramic, or sintered, fused, fired, or calcined
            metal oxide or metal carbide containing (e.g., porcelain,
            brick, cement, etc.)
  34.5    ..Contains fabric, fiber, particle, or filament made of
             glass, ceramic, or sintered, fused, fired, or calcined metal
             oxide or metal carbide or other inorganic compound (e.g.,
             fiber glass, mineral fiber, sand, etc.)
  34.6    ..Multilayer (continous layer))
  34.7    ...Polymer or resin containing (i.e., natural or
              synthetic)
  34.8    .Flexible food casing (e.g., sausage type, etc.)
  34.9    .Shrinkable or shrunk (e.g., due to heat, solvent, volatile
            agent, restraint removal, etc.)
  35.1    ..Single layer (continuous layer)
  35.2    .Nonself-supporting tubular film or bag (e.g., pouch,
            envelope, packet, etc.)
  35.3    ..Elemental metal containing
  35.4    ..Contains vapor or gas barrier, polymer derived from vinyl
             chloride or vinylidene chloride, or polymer containing a vinyl
             alcohol unit
  35.5    ..Single layer (continuous layer)
  35.6    .Cellular material derived from plant or animal source
            (e.g., wood, cotton, wool, leather, etc.)
  35.7    .Polymer or resin containing (i.e., natural or synthetic)
  35.8    ..Elemental metal containing (e.g., substrate, foil, film,
             coating, etc.)
  35.9    ...Three or more layers (continuous layer)
  36.1    ..Textile, fabric, cloth, or pile containing (e.g., web,
             net, woven, knitted, mesh, nonwoven, matted, etc.)
  36.2    ...Textile, fabric, cloth, or pile is sandwiched between
              two distinct layers of material unlike the textile, fabric,
              cloth, or pile player
  36.3    ..Fiber or fibers wound around each other or into a
             self-sustaining shape (e.g., yarn, braid, fibers shaped around
             a core, etc.)
  36.4    ..Randomly noninterengaged or randomly contacting fibers,
             filaments, particles, or flakes
  36.5    ..Foam or porous material containing
  36.6    ..Contains vapor or gas barrier, polymer derived from vinyl
             chloride or vinylidene chloride, or polymer containing a vinyl
             alcohol unit
  36.7    ...Vapor or gas barrier, polymer derived from vinyl
              chloride or vinylidene chloride, or polymer containing a
              vinyl alcohol unit is sandwiched between layers (continuous
              layer)
  36.8    ..Natural or synthetic rubber or rubber-like compound
             containing
  36.9    ..Open-ended, self-supporting conduit, cylinder, or
             tube-type article
  36.91   ...Multilayer (continuous layer)
  36.92   ..Single layer (continuous layer)
  37      SPIRALLY FLAT-WOUND STRAND OR STRIP (E.G., BRAIDED RUG, ETC.)
  38      MASS TRANSMISSIVE OF LIGHT THROUGH ALL LAYERS AND HAVING OPAQUE
           BORDER (E.G., STAINED GLASS, WIRED GLASS, ETC.)
  39      COLLAGE REPRESENTATIVE OF REAL OBJECT
  40      LAYER OR COMPONENT REMOVABLE TO EXPOSE ADHESIVE
  41      .Sectional layer removable
  42      ..Adhesive is on removable layer
  43      SHEET, WEB, OR LAYER WEAKENED TO PERMIT SEPARATION THROUGH
           THICKNESS
  44      TWO DIMENSIONALLY SECTIONAL LAYER
  45      .With frame, casing, or perimeter structure
  46      .Transparent or translucent layer or section
  47      .Next to unitary web or sheet of equal or greater extent
  48      ..Continuous two dimensionally sectional layer
  49      ...Glass, ceramic, or metal sections (e.g., floor or wall tile,,
              etc.)
  50      ...Cellulosic sections (e.g., parquet floor, etc.)
  51      ..Nonrectangular
  52      .Sections connected flexibly with external fastener
  53      THREE OR MORE COPLANAR INTERFITTED SECTIONS WITH SECURING MEANS
  54      LONGITUDINALLY SECTIONAL LAYER OF THREE OR MORE SECTIONS
  55      .Next to unitary sheet of equal or greater extent
  56      ..Continuous sectional layer
  57      SHEETS OR WEBS EDGE SPLICED OR JOINED
  58      .Sheets or webs coplanar
  59      ..Double faced corrugated sheets or webs connected
  60      ..Beveled, stepped, or skived in thickness
  61      ..With noncoplanar reinforcement
  62      ...Pile or nap surface sheets connected
  63      PATCHED HOLE OR DEPRESSION
  64      CIRCULAR SHEET
  65      .With axial aperture
  66      .Edge structure
  67      NONPARTICULATE ELEMENT EMBEDDED OR INLAID IN SUBSTRATE AND
           VISIBLE
  68      SHEET INCLUDING COVER OR CASING
  69      .Filled with gas other than air; or under vacuum
  70      .Encased layer derived from inorganic settable ingredient
  71      .Foamed or expanded material encased
  72      .Including elements cooperating to form cells
  73      ..Honeycomb type cells extend perpendicularly to nonthickness
             layer
  74      .Noninterengaged fibered material encased (e.g., mat, batt,
            etc.)
  75      ..Metal cover or casing
  76      .Complete cover or casing
  77      SHEET FACING AND LONGITUDINALLY NONCOEXTENSIVE WITH WEB OR OTHER
           SHEET
  78      .Sheet smaller in both length and width
  79      ..Smaller sheet has decorative outline
  80      NONRECTANGULAR SHEET
  81      PERIMETER OR CORNER STRUCTURE OF SHEET (EXCLUDING MERE
           RECTANGULAR)
  82      .Pile or nap type surface
  83      .Channel or U-shaped perimeter
  84      .Paper sheet
  85      PILE OR NAP TYPE SURFACE OR COMPONENT
  86      .Interlaminar
  87      .With particles
  88      .Edge feature or configured or discontinuous surface
  89      ..Differential pile length or surface
  90      .Flock surface
  91      .Nap type surface
  92      .Particular shape or structure of pile
  93      ..U-, V-, or W-shaped or continuous strand, filamentary
             material
  94      ...Continuous strand with adhesive bond to backing
  95      .Particular backing structure or composition
  96      .With coating, impregnation, or bond
  97      .Composition of pile or adhesive
  98      STRUCTURALLY DEFINED WEB OR SHEET (E.G., OVERALL DIMENSION,
           ETC.)
  99      .Including fastener for attaching to external surfacee
  100     ..Hook or barb
  101     .Superposed movable attached layers or components
  102     .Including stitching and discrete fastener(s), coating or bond
  103     ..Discontinuous or differential coating, impregnation, or bond
  104     ...Coating, impregnation, or bond in stitching zone only
  105     .Including grain, strips, or filamentary elements in respective
            layers or components in angular relation
  106     ..Wood grain
  107     ..Strand or strand-portions
  108     ...Nonlinear strands or strand-portions
  109     ...With additional layer(s)
  110     ....On each side of strands or strand-portions
  111     .....Including mechanically interengaged strands,
                strand-portions or strand-like strips
  112     ...Oblique to direction of web
  113     ..Fibers
  114     .Including grain, strips, or filamentary elements in different
            layers or components parallel
  115     .Including fringe
  116     .Honeycomb-like
  117     ..Filled honeycomb cells (e.g., solid substance in cavities,
             etc.)
  118     ..Hexagonally shaped cavities
  119     .Including sheet or component perpendicular to plane of web or
            sheet
  120     ..Inward from edge of web or sheet
  121     .Fold at edge
  122     ..Channel-shaped edge component (e.g., binding, etc.)
  123     ..With strand(s) or strand-portion(s) between layers (e.g.,
             upholstery trim, etc.)
  124     ..Acute or reverse fold of exterior component
  125     ...Embedded in body of web
  126     ...At opposed marginal edges
  127     ....Annular cover
  128     .....One piece
  129     ......Abutted or lapped seam
  130     ..Particular fold structure (e.g., beveled, etc.)
  131     .Including aperture
  132     ..Struck out portion type
  133     ...Embedded or interlocked
  134     ..Noncircular aperture (e.g., slit, diamond, rectangular, etc.)
  135     ...Diamond or hexagonal
  136     ...Slit or elongated
  137     ..Composite web or sheet
  138     ...Including nonapertured component
  139     ....Keyed
  140     .....From both sides
  141     .Continuous and nonuniform or irregular surface on layer or
            component (e.g., roofing, etc.)
  142     ..With transparent or protective coating
  143     ..Particulate matter
  144     ...Coated
  145     ....Silicon containing coating
  146     ...Carbohydrate
  147     ...Polymer or resin (e.g., natural or synthetic rubber, etc.)
  148     ...Metal or metal compound
  149     ...Silicon containing
  150     ....Sand, clay, or crushed rock or slatee
  151     ..Artificial wood or leather grain surface
  152     ..Wrinkled, creased, crinkled or creped
  153     ...Paper
  154     ....Plural paper components
  155     ..Crackled, crazed or slit
  156     .Including variation in thickness
  157     ..Differential nonuniformity at margin
  158     ..Foamed or cellular component
  159     ...Component comprises a polymer (e.g., rubber, etc.)
  160     ....Polyurethane
  161     ..With component conforming to contour of nonplanar surface
  162     ...And conforming component on an opposite nonplanar surface
  163     ...Parallel ribs and/or grooves
  164     ...Containing metal or metal compound
  165     ...Including cellulosic or natural rubber component
  166     ..Interlaminar spaces
  167     ..Parallel ribs and/or grooves
  168     ...With particulate matter
  169     ...Oblique to longitudinal axis of web or sheet
  170     ..And varying density
  171     ...Fiber containing component
  172     ..Composite web or sheet
  173     ...With partial filling of valleys on outer surface
  174     .Nonplanar uniform thickness material
  175     ..Embodying mechanically interengaged strand(s),
             strand-portion(s) or strand-like strip(s), (e.g., weave, knit,
             etc.)
  176     ...With folds in parallel planes
  177     ..Differential nonplanarity at margin
  178     ..Forming, or cooperating to form cells
  179     ..Aligned or parallel nonplanarities
  180     ...Waffle-form
  181     ...Pleats or otherwise parallel adjacent folds
  182     ...Parallel corrugations
  183     ....With locally deformed crests or intersecting series of
               corrugations
  184     ....Plural corrugated components
  185     .....With corrugations of respective components intersecting in
                plane projection
  186     .....With planar component
  187     ..Ornamental design or indicia
  188     .Longitudinal or transverse tubular cavity or cell
  189     .Laterally noncoextensive components
  190     ..Fabric, cloth or textile component
  191     ..Cellulosic
  192     .Edge feature
  193     ..Including layer embodying mechanically interengaged strands,
             strand portions or strand-like strips (e.g., weave, knit,
             etc.)
  194     ..Comprising discontinuous or differential impregnation or bond
  195     .Discontinuous or differential coating, impregnation or bond,
            e.g., artwork, printing, retouched photograph, etc.
  196     ..Including layer of mechanically interengaged strands,
             strand-portions or strand-like strips
  197     ...Knitted, with particular or differential bond sites or
              intersections
  198     ..Spot bonds connect components
  199     ..Including developable image or soluble portion in coating orr
             impregnation (e.g., safety paper, etc.)
  200     ..With heat sealable or heat releasable adhesive layer
  201     ..Intermediate layer is discontinuous or differential
  202     ...With outer strippable or release layer
  203     ...Translucent outer layer
  204     ....Intermediate layer contains particulate material (e.g.,
               pigment, etc.)
  205     ....Translucent layer comprises natural oil, wax, resin, gum,
               glue, gelatin
  206     ..Including particulate material
  207     ...Including coloring matter
  208     ...Free metal or mineral containing
  209     ..Including metal layer
  210     ..Including ceramic, glass, porcelain or quartz layer
  211     ..Including paper layer
  212     .Including components having same physical characteristic in
            differing degree
  213     ..Thickness (relative or absolute)
  214     ...Of adhesive layers
  215     ...Absolute thicknesses specified
  216     ....No layer or component greater than 5 mils thick
  217     ..Hardness
  218     ..Density or compression of components
  219     .Weight per unit area specified
  220     .Physical dimension specified
  221     WEB OR SHEET CONTAINING STRUCTURALLY DEFINED ELEMENT OR
           COMPONENT
  222     .Embodying intertwined or helical component(s)
  223     .Including interlaminar mechanical fastener
  224     .Textile, cloth or fabric (woven, knitted, etc., or nonwoven,
            but not paper)
  225     ..Embodying mechanically interengaged strands, strand-portions
             or strand-like strips (e.g., weave, knit, etc.)
  226     ...Including strand-like strips
  227     ...Intertangled strands or strand-portions
  228     ....Glass strands or strand-portions
  229     ...Including structurally modified or defined strand
  230     ...Elastic
  231     ....Including elastic strands
  232     ...With parallel strips or strands not interengaged with other
              strands
  233     ...With paper or other fiber-containing layer or component
  234     ....Needled
  235     .....And coated, impregnated or adhered
  236     ....Coated, impregnated or adhered
  237     .....Including particulate material
  238     .....Strand-type component within layer or between layers
  239     ......With or between fiber-containing layer(s)
  240     ...With particulate material
  241     ....Silicon containing particles (e.g., glass, talc, quartz,
               ceramic, etc.)
  242     ....Metal or metal compound particles
  243     ....Cellulosic particles (e.g., cork, etc.)
  244     ....Free carbon particles (e.g., graphite, etc.)
  245     ...With coating, impregnation or bond
  246     ....Three or more layers
  247     .....Including netted or open mesh strand, filament or strip
  248     .....Cellulosic layerr
  249     ......Plural such layers
  250     .....Natural rubber layer
  251     .....Interengaged strand component includes silicic or free
                metal material (e.g., asbestos, glass, etc.)
  252     .....Interengaged strand component includes synthetic fiber or
                filament
  253     ....Knitted strand, filament, portion or strip
  254     .....Impregnation on single layer only
  255     ....Netted or open mesh strand, filament, portion or strip
  256     .....Metal
  257     ....Particular or differential weave
  258     .....Warp differs from weft
  259     ......Materials differ
  260     ....Coated or impregnated base
  261     .....Adhesive coating or impregnation
  262     .....Coating on surface of base
  263     ......Metal or compound thereof or natural rubber in coating
  264     ......Base is cellulosic material
  265     ......Base comprises synthetic strands, fibers or filaments
  266     .......Silicone, silane or siloxane in coating
  267     .......Polyamide or polyimide (e.g., nylon, etc.) strands
  268     .......Glass fibers, filaments or strands
  269     ......Keyed by penetration of interstices
  270     .....Wool substrate impregnated
  271     .....Asbestos fiber base impregnated
  272     .....Synthetic filament base impregnated
  273     ......Glass
  274     .....Cellulosic monolayer impregnated
  275     ......Impregnation contains metallic compound or free element
  276     ......Phosphorous containing impregnant
  277     .......With halogen
  278     .....Aldehyde or ketone condensation product
  279     .....Quaternary ammonium compound in impregnant
  280     ..Felt fabric
  281     ...With particulate matter
  282     ...At least three layers
  283     ..With particulate matter
  284     ..Fabric with plural layers
  285     ...At least one metal or glass
  286     ...At least one synthetic resin or polymer
  287     ....Polyester, polyamide or polyimide
  288     ..Bonded or coated fibers
  289     ..Fabric has impregnation and/or single coating
  290     ...Synthetic resin or polymer in impregnation or coating
  291     ...Comprising bitumen, tar, natural gum, natural oil, resin or
              wax in coating or impregnant
  292     .Including noninterengaged strand(s) or strand-portion(s)
  293     ..With or in fiber layer
  294     ..Parallel
  295     ...With coating, impregnation or bond of rubber or elastomeric
              material
  296     .Autogeneously bonded fibers
  297     .Including a second component containing structurally defined
            fibers
  298     ..Plural fiber layers
  299     ...Intertangled and/or interfitted
  300     ....Needled
  301     ....With coating, impregnation or bondd
  302     ...With coating, impregnation or bond
  303     ..Physical dimension specified
  304.4   .Composite having voids in a component, e.g., porous,
            cellular, etc.
  305.5   ..With chemically effective material, or specified gas
             other than air, N or carbon dioxide in void-containing
             component
  306.6   ..Void-containing component partially impregnated with
             adjacent component
  307.3   ...Void-containing component is inorganic
  307.7   ....Inorganic impregnant
  308.4   ...Void-containing component is synthetic resin
  308.8   ...Void-containing component is wood or paper
  309.9   ..With internal element bridging layers, nonplanar
             interface between layers, or intermediate layer of commingled
             adjacent foam layers
  310.5   ..With gradual property change within a component
  311.1   ..Void-containing component has a continuous matrix of
             fibers only, e.g., porous paper, etc.
  311.3   ...And a force disintegratable component, e.g., stencil
              sheet, etc.
  311.5   ...Fibers of defined composition
  311.7   ....Cellulosic
  311.9   .....Plural cellulosic components
  312.2   ..Inorganic matrix in void-containing component
  312.4   ...Of hydraulic-setting material
  312.6   ...Of silicon-containing material, e.g., glass, etc.
  312.8   ...Of metal-containing material
  313.3   ..Preformed hollow element-containing
  313.5   ...Resin or rubber element
  313.7   ...Mineral element
  313.9   ...Metal- or silicon-containing element
  314.2   ..Void shape specified, e.g., crushed, flat, round, etc.
  314.4   ..Voids specified as closed
  314.8   ...Specified thickness of void-containing component
              (absolute or relative), numerical cell dimension or density
  315.5   ..Voids specified as micro
  315.7   ...Specified thickness of void-containing component
              (absolute or relative) or numerical cell dimension
  315.9   ...Composite has more than two layers
  316.6   ..Plural void-containing components
  317.1   ..With component specified as adhesive or bonding agent
  317.3   ...As outermost component
  317.5   ...Adhesive or bonding component contains voids
  317.7   ...Composition of adhesive or bonding component specified
  317.9   ..Void-containing component contains also a solid fiber or
             solid particle
  318.4   ..With nonvoid component of specified composition
  318.6   ...Of about the same composition as, and adjacent to, the
              void-containing component
  318.8   ....Integrally formed skin
  319.1   ...Inorganic
  319.3   ...Synthetic resin
  319.7   ....Linear or thermoplastic
  319.9   .....Hydrocarbon polymer
  320.2   .Composite having a component wherein a constituent is
            liquid or is contained within preformed walls, e.g.,
            impregnant-filled, previously void containing component, etc..
  321.1   ..Constituent is in liquid form
  321.3   ...Ink in pores
  321.5   ...Encapsulated liquid
  322.2   ..Indefinite plurality of similar impregnated thin sheets,
             e.g., "decorative laminate" type, etc.
  322.7   ..Differentially filled foam, filled plural layers, or
             filled layer with coat of filling material
  323     .Including a second component containing structurally defined
            particles
  324     ..Mica
  325     ..Glass or ceramic (i.e., fired or glazed clay, cement, etc.),
             (porcelain, quartz, etc.)
  326     ..Cellulosic (e.g., wood, paper, cork, rayon, etc.)
  327     ..Polymeric or resinous material
  328     ..Heavy metal or aluminum or compound thereof
  329     ...Iron oxide or aluminum oxide
  330     ..Alkali metal or alkaline earth metal or compound thereof
  331     ..Silicic material
  332     .Physical dimension specified
  333     ..In terms of molecular thickness or light wave length
  334     ..Coating layer not in excess of 5 mils thick or equivalent
  335     ...Up to 3 mils
  336     ....1 mil or less
  337     ..Of base or substrate
  338     ..Monolayer with structurally defined element
  339     ..Including synthetic resin or polymer layer or component
  340     .Weight per unit area specified (e.g., gms/sq cm, lbs/sq ft,
            etc.)
  341     ..Of coating
  342     ...Cellulosic substrate
  343     .Adhesive outermost layer
  344     ..Next to metal
  345     ..Including irradiated or wave energy treated component
  346     ..Heat or solvent activated or sealable
  347     ...Heat sealable
  348     ....Wax containing
  349     ....Synthetic resin or polymer
  350     ...Water activated
  351     ..Including moisture or waterproof component
  352     ..With release or antistick coating
  353     ..Including a primer layer
  354     ..Three or more layers
  355     ..Adhesive composition
  356     ...Including metal or compound thereof or natural rubber
  357     COATED OR STRUCTUALLY DEFINED FLAKE, PARTICLE, CELL, STRAND,
           STRAND PORTION, ROD, FILAMENT, MACROSCOPIC FIBER OR MASS
           THEREOF
  358     .Channel shape
  359     .Staple length fiber
  360     ..Plural and with bonded intersections only
  361     ..With coating or impregnation
  362     ..Nonlinear (e.g., crimped, coiled, etc.)
  363     .Mica flake
  364     .Rod, strand, filament or fiber
  365     ..Including textile, cloth or fabric
  366     ..Including boron or compound thereof (not as steel)
  367     ..Including free carbon or carbide or therewith (not as steel)
  368     ...In coating or impregnationn
  369     ..Nonlinear (e.g., crimped, coiled, etc.)
  370     ...Composite
  371     ...Helical or coiled
  372     ..Including structurally defined particulate matter
  373     ..Bicomponent, conjugate, composite or collateral fibers or
             filaments (i.e., coextruded sheath-core or side-by-side type)
  374     ...Fibers or filaments nonconcentric (e.g., side-by-side or
              eccentric, etc.)
  375     ..Coated or with bond, impregnation or core
  376     ...Discontinuous or tubular or cellular core
  377     ...Wound or wrapped core or coating (i.e., spiral or helical)
  378     ...Coating on discrete and individual rods, strands or
              filaments
  379     ...Including metal or compound thereof (excluding glass, ceramic
              and asbestos)
  380     ....Plural coatings
  381     .....Free metal in coating
  382     .....Natural rubber in coating
  383     .....Synthetic resin or polymer in plural coatings, each of
                different type
  384     .....Glass, ceramic or metal oxide in coating
  385     ....Metal with weld modifying or stabilizing coating (e.g.,
               flux, slag, producer, etc.)
  386     .....Titanium compound in coating
  387     .....Silicic material in coating
  388     ....Glass or silicic fiber or filament with metal coating
  389     ....Metal or metal compound in coating
  390     ....Rubber, cellulosic or silicic material in coating
  391     ...Silane, silicone or siloxane in coating
  392     ...Artificial fiber or filament
  393     ....Cellulosic
  394     ....Synthetic resin or polymer
  395     .....Polyamide, polyimide or polyester
  396     ...Impregnation
  397     ..Particular cross section
  398     ...Tubular or cellular
  399     ...Longitudinally varying
  400     ...Surface characteristic
  401     ..Physical dimension
  402     .Particulate matter (e.g., sphere, flake, etc.)
  402.2   ..Microcapsule with liquid core
  402.21  ...Solid-walled microcapsule from synthetic polymer
  402.22  ....Addition polymer from unsaturated monomers only
  402.24  ..Microcapsule with solid core
  403     ..Coated
  404     ...Silicic or refractory material containing (e.g., tungsten
              oxide, glass, cement, etc.)
  405     ....Silane, siloxane or silicone coating
  406     ....Glass particles or spheres
  407     ...Including synthetic resin or polymer
  408     SELF-SUSTAINING CARBON MASS OR LAYER WITH IMPREGNANT OR OTHER
           LAYER
  409     SURFACE PROPERTY OR CHARACTERISTIC OF WEB, SHEET OR BLOCK
  410     .Surface modified glass (e.g., tempered, strengthened, etc.)
  411.1   COMPOSITE (NONSTRUCTURAL LAMINATE)
  412     .Of polycarbonate
  413     .Of epoxy ether
  414     ..As intermediate layerr
  415     ...Next to glass or quartz
  416     ...Next to metal
  417     ..Next to glass or quartz
  418     ..Next to metal
  419     .Of polythioether
  420     .Including interfacial reaction product of adjacent layers
  421     .Of fluorinated addition polymer from unsaturated monomers
  422     ..Addition polymer is perhalogenated
  422.8   .Of polyisocyanurate
  423.1   .Of polyamidoester (polyurethane, polyisocyanate,
            polycarbamate, etc.)
  423.3   ..Next to second layer of polyamidoester
  423.4   ..Next to animal skin or membrane
  423.5   ..Next to polyamide (nylon, etc.)
  423.7   ..Next to polyester (polyethylene terephthalate, etc.)
  423.9   ..Next to natural rubber
  424.2   ..Next to addition polymer of ethylenically unsaturated
             monomer
  424.4   ...Ester monomer type (polyvinylacetate, etc.)
  424.6   ...Halide monomer type (polyvinyl chloride, etc.)
  424.7   ...Nitrile monomer type (polyacrylonitrile, etc.)
  424.8   ...Hydrocarbon polymer (polyethylene, polybutadiene, etc.)
  425.1   ..Next to cellulosic
  425.3   ..Next to aldehyde or ketone condensation product
             (phenol-aldehyde, etc.)
  425.5   ..Next to silicon-containing (silicone, cement, etc.)
             layer
  425.6   ...Quartz or glass
  425.8   ..Next to free metal
  425.9   ..Particulate metal or metal compound-containing
  426     .Of quartz or glass
  427     ..Next to a boron containing layer
  428     ..Next to another silicon containing layer
  429     ...As silicone, silane or siloxane
  430     ..Next to polyester (e.g., alkyd)
  431     ...Cross-linked polyester (e.g., glycerol maleate-styrene,
              etc.)
  432     ..Next to metal or compound thereof
  433     ...Alloy or free metal
  434     ....Noble metal containing
  435     ..Next to polyamide or polyimide
  436     ..Next to aldehyde or ketone condensation product
  437     ...Next to acetal of polymerized unsaturated alcohol (e.g.,
              formal butyral, etc.)
  438     ..Next to cellulosic
  439     ...Cellulosic ester
  440     ..Next to natural rubber, gum, oil, rosin, wax, bituminous or
             tarry residue
  441     ..Next to addition polymer from unsaturated monomers
  442     ...Ester, halide or nitrile of addition polymer
  443     .Of asbestos
  444     ..With metal layer
  445     ..With cellulosic layer
  446     .Of silicon containing (not as silicon alloy)
  447     ..As siloxane, silicone or silane
  448     ..As intermediate layer
  449     ...Paper as both adjacent layers
  450     ..Next to metall
  451     ..Next to addition polymer from unsaturated monomers, or
             aldehyde or ketone condensation product
  452     ..Next to cellulosic
  453     ...Sodium silicate
  454     ..Sand, clay or mica (silica excluded)
  455     .Of cork
  456     ..Including natural oil or gum or rosin (e.g., linoleum, etc.)
  457     .Of metal
  458     ..Next to polyester, polyamide or polyimide (e.g., alkyd, glue,
             or nylon, etc.)
  459     ...Natural source polyamide (e.g., casein, gelatin, etc.)
  460     ..Next to aldehyde or ketone condensation product
  461     ..Next to addition polymer from unsaturated monomers
  462     ...Including polyene monomers (e.g., butadiene, etc.)
  463     ...Ester, halide or nitrile of addition polymer
  464     ..Next to cellulosic
  465     ..Next to natural rubber
  466     ...With natural rubber next to second layer of natural rubber
  467     ..Next to natural gum, natural oil, rosin, lac or wax
  468     ..Next to bituminous or tarry residue
  469     ..Next to metal salt or oxide
  470     ...Organo-metallic salt
  471     ...Alkali or alkaline earth metal oxide
  472     ...Refractory metal salt or oxide
  472.1   ....Formed in situ
  472.2   ...Aluminium or iron salt or oxide formed in situ
  472.3   ...Phosphorus containing metal salt formed in situ
  473     .Of animal membrane or skin
  473.5   .Of polyimide
  474.4   .Of polyamide
  474.7   ..Next to second layer of polyamide
  474.9   ...At least one layer is nylon type
  475.2   ..Next to polyester
  475.5   ..Nylon type
  475.8   ...Next to addition polymer from unsaturated monomer(s)
  476.1   ....Polymer of monoethylenically unsaturated hydrocarbon
  476.3   ..Next to addition polymer from unsaturated monomer(s)
  476.6   ...Natural source-type polyamide
  476.9   ...Polymer of monoethylenically unsaturated hydrocarbon
  477.4   ..Next to aldehyde or ketone condensation product
  477.7   ..Inorganic-containing or next to inorganic-containing
  478.2   ..Natural source-type polyamide, e.g., casein, gelatin,
             etc.
  478.4   ...Next to cellulosic
  478.8   ....Paper
  479.3   ..Next to cellulosic
  479.6   ...Paper or wood
  480     .Of polyester (e.g., alkyd, etc.)
  481     ..Next to cellulosic
  482     ..Of cross-linked polyester
  483     ..Next to addition polymer from unsaturated monomers
  484     .Of wax or waxy material
  485     ..Next to cellulosic
  486     ...Cellulosic is paper
  487     ....Glassine paper
  488.1   ....With pigment or dye (e.g., carbon paper, hectograph
               paper, etc.)
  488.4   .....Having layer over transferable material or on carrierr
                opposite transferable material layer
  489     .Of bituminous or tarry residue
  490     ..Next to cellulosic
  491     ...Paper
  492     .Of natural rubber
  493     ..Next to second layer of natural rubber
  494     ..Next to aldehyde or ketone condesation product or addition
             polymer from unsaturated monomers
  495     ...Including polyene monomers
  496     ..Next to cellulosic
  497     .Of natural gum, rosin, natural oil or lac
  498     ..Next to cellulosic
  499     ...Natural oil
  500     .Of addition polymer from unsaturated monomers
  501     ..Next to an aldehyde or ketone condensation product
  502     ...Melamine-aldehyde
  503     ....Impregnated or coated cellulosic material
  504     ...Amide-aldehyde
  505     ....Urea or modified urea-aldehyde
  506     ...Phenol-aldehyde
  507     ..Next to cellulosic
  508     ...Regenerated or modified cellulose
  509     ....Addition polymer of hydrocarbon(s) only
  510     ....Where addition polymer is an ester or halide
  511     ...Paper or wood
  512     ....Addition polymer of hydrocarbon(s) only
  513     .....Monoethylenically unsaturated
  514     ....Ester, halide or nitrile of addition polymer
  515     ..Next to second addition polymer from unsaturated monomers
  516     ...Monoolefin polymer
  517     ....Next to polyene polymer
  518     ....Next to vinyl or vinylidene chloride polymer
  519     ...Including polyene monomers
  520     ...Ester, halide or nitrile of addition polymer
  521     ..Polyene monomer-containing
  522     ..Ester, halide or nitrile of addition polymer
  523     ..Polymer of monoethylenically unsaturated hydrocarbon
  524     .Of aldehyde or ketone condensation product
  525     ..Next to second aldehyde or ketone condensation product
  526     ..Next to cellulosic
  527     ...Modified or regenerated cellulose
  528     ...Wood
  529     ....Phenoplast
  530     ...Paper
  531     ....Phenoplast
  532     .Of carbohydrate
  533     ..Of cellulosic next to another carbohydrate
  534     ...Cellulosic next to another cellulosic
  535     ....Wood or paper
  536     ....Regenerated or modified
  537.1   ..Of wood
  537.5   ..Of paper
  537.7   ...Next to layer of metal salt, e.g., plasterboard, etc.
  688     .Of inorganic material
  689     ..Metal-compound-containing layer
  690     ...Fluorescent, phosphorescent or luminescent layer
  691     ....Halogen-containing
  692     ...Defined magnetic layerr
  693     ....Next to second metal-compound-containing layer
  694 R   ....Dynamic recording medium
  694 ML  .....Magneto optical recording layer
  694 SC  ......Specified recording layer composition
  694 LE  .......Lanthanoid
  694 GT  .......Garnet or magnetoplumbite
  694 DE  .......Separate refractive, anti-reflective or protective
                  layer composition
  694 MT  .......Pure metal or alloy
  694 RE  ........Rare earth
  694 NF  .......Nitride, carbide, or fluoride
  694 XS  .......Oxide or sulfide
  694 RL  ......Reflective layer specified
  694 AH  ......With plasma polymerized organic top coat or other
                 adhesive layer
  694 MM  ......Multiple magnetic layers
  694 EC  .......Exchange coupling
  694 IS  .......Magnetically or thermally isolated
  694 GR  ......Composition gradient
  694 PR  ......Hardness, stress, thermal or electrical coefficients
                 specified
  694 MP  ......Microporous layer
  694 T   .....Metal thin film magnetic layer
  694 TS  ......Specified subbing or underlayer
  694 TB  ......Specified back coat layer
  694 TP  ......Topcoat, or protective overlayer
  694 TC  .......Carbon
  694 TZ  .......Plasma polymerized
  694 TF  .......Fluorocarbon or organosilicon layer
  694 TR  ......Specified surface feature or roughness
  694 TM  ......Multiple magnetic layer
  694 B   .....Binder containing magnetic layer
  694 BC  ......Radiation curable binder
  694 BG  ......Organic acid or salt thereof
  694 BU  ......Polyurethane binder
  694 BY  .......Isocyanate specified
  694 BL  .......Polyol specified
  694 BP  ......Specified lubricant or protective layer
  694 BF  .......Flurorocarbon or Organosilicon
  694 BS  ......Including subbing or underlayer
  694 BB  ......Including back coat layer
  694 BR  ......Specified surface feature or roughness
  694 BN  ......|With non-magnetic particle
  694 BA  ......Magnetic particle with specified shape or dimension
  694 BH  .......Hexogonal or tabular
  694 BM  ......Multiple magnetic layers
  694 ST  .....Support composition specified
  694 SL  ......Organic material
  694 SG  ......Specified surface feature or roughness
  695     .....With lubricant in or on layer
  696     ...Halogen-containing
  697     ...Layer contains compound(s) of plural metals
  698     ...Carbide-, nitride-, or sulfide-containing layer
  699     ...Next to second metal-compound-containing layer
  700     ....Single crystal
  701     ....O-containing metal compound
  702     ...O-containing
  703     ....Water-settable material, e.g., gypsum, etc..
  704     .Of B, N, P, S or metal-containing material
  539.5   METAL CONTINUOUS PHASE INTERENGAGED WITH NONMETAL
           CONTINUOUS PHASE
  540     IMPREGNATED NATURALLY SOLID PRODUCT (E.G., LEATHER, STONE,
           ETC.)
  541     .Wood timber product (e.g., piling, post, veneer, etc.)
  542.2   DECORATIVE ARTICLE
  542.4   .Trophy or memento, e.g., preserved artifact, etc.
  542.6   .Constructed from filamentary or flat sheet material
  542.8   ARTICLE OF INTERMEDIATE SHAPE, E.G., BLANK, PARISON,
           PREFORM, ETC.
  543     MISCELLANEOUS (E.G., TREATED SURFACES, ETC.)
  *       ******************************
  *       CROSS-REFERENCE ART COLLECTIONS
  *       ******************************
  900     MAGNETIC FEATURE
  901     PRINTED CIRCUIT
  902     HIGH MODULUS FILAMENT OR FIBER
  903     MICROFIBER (LESS THAN 100 MICRON DIAMETER)
  903.3   RECYCLED MATERIALS
  904     ARTIFICIAL LEATHER
  904.4   WALL AND SHELF COVERINGS
  905     ODOR RELEASING MATERIAL
  906     ROLL OR COIL
  906.6   EMBROIDERY
  907     RESISTANT AGAINST PLANT OR ANIMAL ATTACK
  907.7   LAYER OR ARTICLE RENDERED LIGHT-TRANSMISSIVE BY PRESSURE,
           E.G., BLUSHED, ETC.
  908     IMPRESSION RETENTION LAYER (E.G., PRINT MATRIX, SOUND RECORD,
           ETC.)
  908.8   WEAR-RESISTANT LAYER
  909     RESILIENT LAYER (E.G., PRINTER'S BLANKET, ETC.)
  910     PRODUCT WITH MOLECULAR ORIENTATION
  911     PENETRATION RESISTANT LAYER
  912     PUNCTURE HEALING LAYER
  912.2   MIRROR
  913     MATERIAL DESIGNED TO BE RESPONSIVE TO TEMPERATURE, LIGHT,
           MOISTURE, ETC.
  913.3   DECORATIVE ARTICLE FOR VIEWING FROM ONE SIDE ONLY, E.G.,
           PLAQUE, ETC.
  914     TRANSFER OR DECALCOMANIA
  915     .Fraud or tamper detecting
  916     FRAUD OR TAMPER DETECTING
  917     ELECTROLUMINESCENT
  918     MATERIAL ABNORMALLY TRANSPARENT
  919     CAMOUFLAGED ARTICLE
  920     FIRE OR HEAT PROTECTION FEATURE
  921     .Fire or flameproofing
  922     STATIC ELECTRICITY METAL BLEED-OFF METALLIC STOCK*
  923     .Physical dimension
  924     ..Composite
  925     ...Relative dimension specified
  926     ...Thickness of individual layer specified
         .Special properties
  927     ..Decorative informative
  928     ..Magnetic
  929     ..Electrical contact feature
  930     ..Electric superconductingg
  931     ..Components of differing electric conductivity
  932     ..Abrasive or cutting feature
  933     ..Sacrificial component
         .Product by special process
  934     ..Electrical process
  935     ...Electroplating
  936     ..Chemical deposition, e.g., electroless plating, etc.
  937     ..Sprayed metal
  938     ..Vapor deposition or gas diffusion
  939     ..Molten or fused coating
  940     ..Pressure bonding, e.g., explosive, etc.
  941     ..Solid state alloying, e.g., diffusion, to disappearance of an
             original layer