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.


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363-131 121-55A 14-.5
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Class Number: 523
 Class Title: SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS
              520 SERIES

Subclass  Subclass
Number    Title

  *       SYNTHETIC RESINS (Class 520, Subclass 1)
  1       .PROCESSES OF PREPARING A DESIRED OR INTENTIONAL COMPOSITION OF
            AT LEAST ONE NONREACTANT MATERIAL AND AT LEAST ONE SOLID
            POLYMER OR SPECIFIED INTERMEDIATE CONDENSATION PRODUCT, OR
            PRODUCT THEREOF
  100     ..Food or tobacco contact composition or process of preparing
  101     ...Food release coating
  102     ..Odor masked, odor reduced or perfumed composition or process
             of preparing
  103     ..Composition having reduced health risks upon exposure thereto
             during incidental handling or body contact or process of
             preparing; other than fricton elements
  105     ..Nonmedicated composition specifically intended for contact
             with living animal tissue or process of preparing; other than
             apparel
  106     ...Contact lens making composition
  107     ....Silicon-containing organic polymer
  108     ....Polymer of a heterocyclic N-vinyl polymerizable compound
  109     ...Dental or body impression taking material
  111     ...Compositions for use in tape adhesives, binder or impregnate
              for a body fluid adsorbent device, e.g., a surgical adhesive
              tape, etc.
  112     ...Non-thrombogenic
  113     ...Composition suitable for use as tissue or body member
              replacement, restorative, or implant
  114     ....Composition which anchors by ingrowth of surrounding tissue
  115     ....Composition suitable for use as tooth or bone replacement,
               restorative, or implant
  116     .....Cement or filling composition
  117     ......Radio- or X-ray opaque
  118     ....Sealant or adhesive
  120     ...Denture plate repair, adhesive, cushion or modification
              composition, e.g., modification of denture base to improve
              fit, etc.
  121     ...Aperture affecting composition, e.g., earplug, dilator, etc.
  122     ..Composition having ingredient providing biocidal or biostatic
             protection thereto or process of preparing
  123     ..Plant receptacle composition or process of preparing
  124     ..Composition containing an additive which enhances degradation
             by environmental stimuli or process of preparing
  125     ...By light, heat, or radiation
  126     ....Containing organic salt of a transition metal
  127     ....Containing organohalogen additive
  128     ...Containing carbohydrate or cellular material derived from
              plant or animal
  129     ..Composition containing nonresinous organic material derived
             from municipal solid waste disposal system or process of
             preparing
  130     ..Composition for plugging pores in wells or other subterranean
             formations; consolidating formations in wells or cementing a
             well or process of preparingg
  131     ...Composition for treating unconsolidated or loose strata,
              e.g., sand consolidation, etc.
  132     ..Composition for in situ soil conditioning or treating or
             process of preparing
  134     ..Battery container or battery container cover composition or
             process of preparing
  135     ..Solar energy absorption or solar reflection composition or
             process of preparing
  136     ..Composition sensitive to or resistant to radioactive material
             or cathode rays (e.g., electron bombardment, etc.) or process
             of preparing
  137     ..Electromagnetic wave absorbing composition or process of
             preparing (excludes visible, IR or UV portions of spectrum)
  138     ..Composition for contact with hot propulsion or exhaust gas or
             process of preparing
  139     ..Composition related to metal foundry molding or metallurgical
             furnace or process of preparing
  140     ...Hot-top or taphole plug composition or process of preparing
  141     ...Composition for metallurgical furnace or oven or process of
              preparing
  142     ...Organic polyisocyanate or derived from polyisocyanate
  143     ....Phenolic, amine, or ketone condensate with aldehyde
  144     ...Furan-type material
  145     ...Phenolic or amine or ketone condensate with aldehyde
  146     ....With or derived from carboxylic acid or salt thereof, or
               organic sulfur material
  147     ....With or derived from organic hydroxyl group containing
               material containing eight or more carbon atoms
  148     ...Polyester based
  149     ..Friction element composition or process of preparing
  150     ...Nonskid or nonslip composition for vehicle or pedestrian
              movement
  152     ...For wheeled vehicle
  153     ....Containing fibrous or polycrystalline refractory oxide
  155     ....Composition devoid of asbestos
  156     .....Containing at least two organic materials, e.g., binder
                plus other organic material, etc.
  157     ....Containing at least two organic materials, e.g., binder plus
               other organic material, etc.
  158     .....Composition contains a phenolic, amine, or ketone
                condensate with aldehyde plus a polymer derived from
                ethylenic monomers only
  159     ....Containing asbestos and at least one inorganic material
  160     ..Printing ink composition for glass or ceramic substrate or
             process of preparing
  161     ..Invisible, ballpoint, or typewriter ink compositions or
             process of preparing; or composition for correction ribbons or
             correction fluids or process of preparing
  164     ..Lead pencil or marking crayon composition or process of
             preparing
  166     ..Composition for puncture proof tire liner or in emergency tire
             repair (e.g., tire inflation, etc.) or process of preparing
  167     ..Composition utilized in the manufacturing or repairing of
             shoes (excluding shoe heels or soles or polish) or process of
             preparing
  168     ..Optical glass cementing or slide mounting composition or
             process of preparing
  169     ..Antifogging or water repellent composition for optical orr
             windshield application or process of preparing
  170     ..Glass enamel composition or process of preparing
  171     ..Composition having opalescent, pearlescent, or variegated
             color or process of preparing
  172     ..Pavement or sign marking or reflex reflecting composition or
             process of preparing
  173     ..Cable filling or flooding composition or process of preparing
  174     ..Phonograph record molding composition or process of preparing
  175     ..Liquid-solid drag reduction composition or process of
             preparing
  176     ..Anaerobic adhesive or thread sealing composition or process of
             preparing
  177     ..Coating or adhesive composition for application to a wet or
             contaminated surface (e.g., underwater or oil-contaminated,
             etc.) or process of preparing
  179     ..Intumescent coating or ablative composition or process of
             preparing
  180     ..Solid propellant binder composition or process of preparing
  181     ..Composition devoid of magnetic materials and suitable for
             preparation of magnetic tape recording or process of
             preparing
  200     ..Process of forming a composition of a solid polymer or solid
             polymer forming system by admixing a product in the form of a
             surface coated, impregnated, encapsulated, or surface modified
             fiber, sheet, particle, or web, with a material; or
             composition which is the result of said admixing
  201     ...Solid polymer particle enclosed in layer of diverse solid
              polymer, e.g., core-shell, etc.
  202     ...Product having a monomeric ethylenic reactant material
  203     ....Silicon ethylenic reactant
  204     ...Product having an inorganic material surface coated onto an
              organic substrate
  205     ...Product having a solid synthetic polymer or solid
              polymer-forming system
  206     ....Product having two or more solid synthetic polymers, or a
               solid polymer and a solid polymer-forming system
  207     ....Solid polymer or solid polymer-forming system is
               encapsulated in or impregnated in a nonreactant material
  208     ....Solid polymer or solid polymer-forming system is or derived
               from an aldehyde or derivative
  209     ....Product having a silicon atom
  210     ...Product having a material encapsulated in or impregnated in a
              nonreactant material
  211     ....Reactant or catalyst is material encapsulated or
               impregnated
  212     ...Product having a silicon atom as part of an organic compound
  213     ....Silicon containing organic material having an atom other
               than Si, C, H, or oxygen
  214     ....Product having glass
  215     ...Product having elemental carbon
  216     ...Product having a silicon atom
  217     ....Glass
  218     ..Process of forming a composition having a nonreactant material
             selected for its special void characteristic; or composition
             containing same, e.g., syntactic foam, etc.
  219     ...Glass void
  220     ..Process of forming a composition having two or more solid
             materials having defined physical dimensions or surface areas;;
             or composition containing same
  221     ...Two or more solid synthetic polymers having defined physical
              dimension or surface area
  222     ..Process of forming a composition having a fiber which is
             twisted, coiled, or involves specific mechanically
             interengaged fibers other than fibers solely of glass; or
             composition containing same, e.g., textiles, cloth, fiber
             bundles, mats, etc.
  223     ..Process of forming a composition of a spheroidal material
             having physical dimension or composition containing same
  300     ..Utilizing direct application of magnetic, electrical, or wave
             energy
  303     ..Controlling process in response to a stated measurement or
             test
  305     ..Adding material to maintain a stated equilibrium condition
             wherein the added material does not merely displace an equal
             amount from the treatment zone
  306     ..Utilizing energy potential described as obtained as waste or
             by-product from a prior or concurrent operation
  307     ..Utilizing a temperature greater than 250 degrees C (482
             degrees F) or less than 0 degrees C
  309     ...With removal or comminution of material at a temperature
              greater than 250 degrees C or less than 0 degrees C, e.g.,
              freeze drying, etc.
  310     ..Utilizing an ion exchanger or a solid sorptive material or
             semipermeable membrane
  312     ..Utilizing quiescent treatment condition
  313     ..Utilizing mixing in a manner designed to avoid or minimize
             turbulence or shear, e.g., laminar flow, etc.
  315     ..Utilizing streams or masses moving relative to each other at a
             described angle of coincidence other than mere pouring, e.g.,
             counter-current mixing, etc.
  318     ..Utilizing stream or mass moving in a described attitude of
             presentment relative to a zone, vessel, or another apparently
             stationary mass or stream, excluding mere "pouring into",
             e.g., from above, below, tangentially, etc.
  319     ..Utilizing treating or forming motion described by numerical
             data other than mere temperature, pressure, time, or amounts
             of material
  322     ...Rotational rate (RPM) or velocity
  323     ...Work input, e.g., horsepower-hour/pound, etc.
  324     ..Utilizing a treatment zone specifically described by shape
             (other than nominally helical) or at least a part of which
             zone is specifically described by dimension, material,
             proportion, or angle or orientation
  326     ..Adding steam or hot water (T at least 60 degrees C, i.e., 140
             degrees F)
  328     ...Removal of material by treatment with hot water or steam,
              e.g., steam stripping, etc.
  330     ..Utilizing a gaseous stream to suspend or agitate a particulate
             solid polymer composition, e.g., fluidized bed, etc.
  331     ..Drying a composition which is situated on a moving substrate
             or drying utilizing a thin film evaporator
  332     ..Extracting material from solid polymer latex or aqueous
             dispersion or suspension with a liquid nonreactant material,
             e.g., solvent stripping, coprecipitation, etc.
  333     ..Admixing a nonreactive additive ingredient in the form of a
             slurry, dispersion, or suspension (liquid-solid); said slurryy
             dispersion or suspension containing no solid polymer or SICP
  334     ...Slurried, dispersed, or suspended ingredient admixed with
              previously formed latex, aqueous dispersion or aqueous
              suspension of a solid polymer
  335     ..Creaming, agglomerating, or coalescing a solid polymer latex
             or aqueous dispersion wherein solid polymer latex or aqueous
             dispersion is the result
  336     ..Inverting phase relationships or reapportioning the
             distribution of ingredients among phases
  337     ...Inversion to form water-in-oil system
  339     ...With removal of a phase
  340     ..Removing material at reduced pressure, e.g., flashing,
             sublimation, spray drying, etc.
  342     ...With step of spraying or centrifuging
  343     ..Treating an intentional composition with a step of removing
             and recycling material into the composition
  344     ..Multistep operation achieved within a stated interval of time,
             e.g., total cycle time, etc.
  346     ..Utilizing plural mixing operations of specified varying
             intensity, e.g., intensity of each mixing is reduced, etc.
  347     ..Utilizing plural discrete pressures different than ambient
  348     ..Utilizing plural interconnected distinct forming or treating
             zones or locations other than nominal screw extruder, e.g.,
             zones interconnected in parallel or having varying flow
             velocity, etc.
  351     ..Utilizing plural mixing operations in preparation of a solid
             polymer inert ingredient concentrate, e.g., master batch,
             etc.
  352     ..Utilizing multistage coagulation of a solid polymer latex
  353     ..Utilizing plural discrete mixing operations in specifically
             described distinct noninterconnected zones
  375     ..Radioactive or Group VIIIA atom containing NRM
  400     ..Process of forming a composition containing a nonreactive
             material (NRM) and a polymer containing more than one
             1,2-epoxy group, or a preformed polymer derived from or
             admixed with a reactant containing more than one 1,2-epoxy
             group, or with a polymer derived from an epihalohydrin and a
             polyhydric phenol or polyol; or composition or product
             thereof
  401     ...Contains inorganic water settable material NRM
  402     ...Product contains water per se or water of hydration as
              designated nonreactive material (DNRM)
  403     ....Two or more polymers containing more than one 1,2-epoxy
               group, two or more polymers derived from reactants
               containing more than one 1,2-epoxy group, or combination
               thereof, or one of said polymers and a reactant containing
               at least one 1,2-epoxy group
  404     .....With organic nitrogen or organic sulfur reactant
  406     ....Solid polymer derived from ethylenic reactants only
               (includes in situ reactants from plural 1,2-epoxides)
  407     .....Polymer derived from ethylenic reactants only is graft,
                graft-type, block, or block-type copolymer
  408     .....Two or more polymers derived from ethylenic reactants only
  409     .....Polymer derived from ethylenic reactants only derived from
                reactant containing chalcogen
  410     ......Polymer derived from ethylenic reactant only derived from
                 reactant containing oxygen heterocycle
  411     ......Polymer derived from ethylenic reactants only derived fromm
                 reactant containing nitrogen
  412     ......Polymer from ethylenic reactants only derived from
                 reactant-containing carboxylic acid ester
  413     .....Polymer derived from ethylenic reactants only derived from
                plural unsaturated reactant
  414     ....Polymer contains more than one 1,2-epoxy group or one
               derived from reactant containing more than one 1,2-epoxy
               group is further derived from or reacted with organic
               nitrogen or sulfur
  415     .....Organic nitrogen compound contains isocyanate group
  416     .....Organic nitrogen compound is amine-aldehyde condensation
                product
  417     .....Two or more organic nitrogen compounds as reactants
  418     .....Organic nitrogen compound contains N-(C)*-(C=O)- group
                where *= subscript 0,1,2 . . ., e.g., protein, etc.
  420     .....Organic nitrogen compound contains three or more nitrogen
                atoms other than as solid polymer, e.g., diethylene
                triamine, etc.
  421     .....Organic nitrogen compound contains element other than C, H,
                O, or N
  423     ....Polymer is graft, graft-type, block, or block-type
               copolymer
  424     ....Polymer is phenol-aldehyde condensation product
  425     ....Polymer derived from silicon reactant
  426     ....Carboxylic acid, ester, or salt thereof DNRM
  427     ...Composition wherein two or more polymers or a polymer and a
              reactant all contain more than one 1,2-epoxy group, or
              product thereof
  428     ....With reactant nitrogen or sulfur compound
  429     .....Organic nitrogen compound contains N-heterocycle
  433     ....Polymer derived from reactant containing element other than
               C, H, O, or N or chlorine-containing reactant of three or
               more carbon atoms
  434     ....Polymer derived from ethylenic reactants only
  435     ...Solid polymer derived from reactant containing element other
              than C, H, O, or N or chlorine-containing reactant of three
              or more carbon atoms
  436     ...Polymer is graft, graft-type, block, or block-type
  437     ...Two or more polymers derived from ethylenic reactants only
  438     ....Polymer derived from ethylenic reactants only derived from
               plural unsaturated reactant
  439     ...Polymer derived from ethylenic reactants only derived from
              heterocyclic reactant other than 1,2-epoxy solely
  440     ...Designated nonreactive material (DNRM) has numerically
              specified characteristics, e.g., particle size, density,
              etc., other than viscosity, m.p., b.p., molec. wt., chemical
              composition or percentage range
  442     ....Heavy or transition metal or compound thereof
  443     ....Silicon
  444     .....Glass
  445     ...Boron DNRM
  446     ...Biologically derived cellular material other than cereal,
              cotton, or diatomaceous earth DNRM
  447     ...Carbohydrate or derivative including tannin or derivative
              DNRM
  448     ....Cellulose derivative containing -C(=O)OR or N
  449     ...Protein or biologically active polypeptide DNRM
  450     ...Coal, asphaltic, or bituminous material DNRMM
  451     ...Phosphorus DNRM
  452     ....Phosphorus directly bonded to nitrogen
  453     ...Organic sulfur compound DNRM
  454     ...Ketone or aldehyde DNRM
  455     ...Carboxylic acid or derivative devoid of heavy metal atom
              DNRM
  456     ...Organic chalcogen compound DNRM
  457     ...Elemental metal or metal compound other than as silicate
              DNRM
  458     ....Transition metal
  459     ....Heavy metal
  460     .....Group VA metal (As, Sb, Bi)
  461     ...Organic nitrogen compound DNRM
  462     ...Halogenated hydrocarbon other than carbon tetrachloride,
              chloroform, or methylene chloride DNRM
  463     ...Hydrocarbon other than xylenes, benzene, or toluene DNRM
  464     ....Hydrocarbon having ethylenic unsaturation
  465     ....Hydrocarbon wax
  466     ...Inorganic SI-O bond DNRM
  467     ....Polymer derived from ethylenic reactants only
  468     ...Elemental carbon DNRM
  500     ..Process of forming a composition of an ethylenically
             unsaturated reactant or ethylenically unsaturated polymer
             admixed with nonreactive material (NRM) and a polyester whose
             polymer backbone was derived through the direct formation of
             the ester linkage, e.g., polyethylene terephthalate,
             polycaprolactone, etc., or product thereof
  501     ...Product contains water per se or water of hydration as DNRM
              or admixed with other designated nonreactant material
  502     ....Composition contains water-in-oil or oil-in-water mixture
  503     ....Organic nitrogen DNRM
  504     ....Organic chalcogen DNRM
  505     ....Metal compound other than silicate as DNRM
  506     ...Phosphorus DNRM
  507     ...Organic sulfur DNRM
  508     ...Organic compound containing nitrogen DNRM
  509     ...Carbohydrate or derivative including tannin or derivative
              DNRM
  510     ...Phenol, phenol ether, or phenolate salt DNRM
  511     ...Organic chalcogen other than metallocarboxylate salt, e.g.,
              diethylene glycol, etc., DNRM
  512     ...Elemental metal or elemental carbon DNRM
  513     ...Designated nonreactive material (DNRM) has numerically
              specified characteristic, e.g., particle size, density, etc.,
              other than viscosity, m.p., b.p., molec. wt., chemical
              composition or percentage range
  514     ...Metal atom other than as silicate DNRM
  515     ....Transition metal atom
  516     ....Heavy metal atom
  517     ...Halogenated hydrocarbon other than methylene chloride,
              chloroform, or carbon tetrachloride DNRM
  518     ...Bituminous, coal, or hydrocarbon other than benzene, toluene,
              or xylene or mixtures thereof DNRM
  521     ...Inorganic silicon atom other than glass DNRM
  522     ...Contains graft, graft-type, block, or block-type copolymer
  523     ...Contains solid polymer derived from ethylenic reactants only,
              one of which contains chalcogen; or solid polymer reacted
              with ethylenic reactant containing chalcogenn
  526     ...Contains polymer derived from ethylenically unsaturated
              reactant only
  527     ...Glass DNRM