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
that is, no embedded spaces, class and subclass seperated by a dash, and any subclass letters capitalized. Currently Design Patent titles (those in the classes of the form Dxx.yy) are not retreivable.

Enter class/subclass code:


Class Number: 534
 Class Title: ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES

Subclass  Subclass
Number    Title

  *       ORGANIC COMPOUNDS (CLASS 532, SUBCLASS 1)
  7       .Noble gas containing (i.e., He, Ne, Ar, Kr, Xe, or Rn
            containing)
  10      .RADIOACTIVE METAL CONTAINING (At. No. 43, 61 or 84+; or
            radioactive isotope of another metal)
  11      ..Actinide series metal (At. No. 89+)
  12      ...Containing -C(=X)-, wherein X is chalcogen (e.g., carbonyl
              containing, etc.)
  13      ....The -C(=X)- is part of a -C(=X)X- group, wherein the X's are
               the same or diverse chalcogens
  14      ..Technetium containing (At. No. 43; Tc)
  15      .RARE EARTH METAL CONTAINING (At. No. 21, 39, 57-60 or 62-71)
  16      ..Containing -C(=X)X-, wherein the X's are the same or diverse
             chalcogens
  550     .Diazoamino (e.g., triazenes, etc.)
  551     ..Hetero ring containing
  552     ..Chalcogen or additional nitrogen bonded directly to the
             diazoamino group
  553     ..Noncarbon atom double or triple bonded and the diazoamino
             group bonded directly to the same acyclic carbon
  554     ..Plural benzene rings bonded directly to the diazoamino group
  555     ..Processes
  556     .Diazooxide or diazotate (e.g., -N=N-0-, etc.)
  557     ..Sulfur attached directly to a ring by nonionic bonding
  558     .Diazo or diazonium (e.g., -N=N-C, etc.)
  559     ..With preservative or stabilizer
  560     ..Hetero ring containing
  561     ..Plural diazo or diazonium groups
  562     ..Heavy metal or aluminum containing
  563     ..Polycyclo ring system having at least three cyclos
  564     ..Aldehyde or ketone group containing
  565     ..Formation of diazonium group
  566     .Azoxy
  567     ..Hetero ring containing
  568     ..Azodioxy
  569     ..Heavy metal or aluminum containing
  570     ..Sulfonic acid group containing (-(0=)S(=O)-OH, wherein H of
             -OH may be replaced by a substituted or unsubstituted ammonium
             ion or metal)
  571     ...Stilbene containing
  572     ..Formation of azoxy group
  573     .Azo
  574     ..Quaternary azo group containing
  575     ..Specified crystalline form
  576     ..With preservative or stabilizer
  577     ..Liquid crystal (e.g., pleochroic, etc.)
  578     ..Formation of azo group by oxidative coupling
  579     ..Formation of azo group by simultaneous diazotization and
             coupling
  580     ..Formation of azo group from diazoamino group
  581     ..Formation of azo group by coupling diazonium compound with
             coupling component in presence of an additional organicc
             compound
  582     ..Formation of azo group by coupling diazonium compound with
             coupling component at a specified pH range
  583     ..Formation of azo group by coupling diazonium compound with
             coupling component in presence of ammonia, a Group IIA light
             metal hydroxide or a Group IA or IIA light metal phosphate
  584     ..Formation of azo group by coupling diazonium compound with
             coupling component in other than stoichiometric proportions
  585     ..Formation of azo group by reduction of nitro group
  586     ..Formation of azo group from group having nitrogen single
             bonded to nitrogen
  587     ..Formation of azo group directly from nitrogen containing
             compound by process other than diazotization and coupling
  588     ..Process utilizing azo compound as reactant
  589     ...Formation of quaternary ammonium or hydrazinium group
  590     ...Ring formation
  591     ...Formation of -C(=X)HNH group, wherein X is chalcogen
              (substitution may be made for hydrogen only)
  592     ...Formation of sulfonamide group
  593     ...Additional reactant containing phosphorus or sulfur
  594     ....Sulfonic acid group formed or added to the azo reactant
               (-(0=)S(=0)-OH, wherein H of -0H may be replaced by a
               substituted or unsubstituted ammonium ion or metal)
  595     ...Formation of -C(=X)X- ester group, wherein the X's may be the
              same or diverse chalcogens
  596     ...Etherification of hydroxy group
  597     ...Replacement of halogen by cyano group
  598     ...Replacement of halogen by amino nitrogen
  599     ...Hydrolysis
  600     ...Reduction of nitro or nitrogen oxide group
  601     ...Nitration
  602     ...Metallization of the azo reactant in presence of an
              additional organic compound
  603     ..Quaternary ammonium or hydrazinium attached indirectly to an
             azo group by nonionic bonding
  604     ...Hetero ring containing
  605     ....The pentavalent nitrogen is a ring member
  606     .....Azo bonded directly to a hetero ring or to a polycyclo ring
                system having a hetero ring as one of the cyclos
  607     ......The hetero ring contains the pentavalent nitrogen
  608     .......Plural azo groups in the same azo moiety attached
                  indirectly to each other by nonionic bonding
  609     .......Acyclic carbon bonded directly to the azo group
  610     .......Additional hetero ring or polycyclo ring system having a
                  hetero ring as one of the cyclos bonded directly to the
                  azo group
  611     .......The hetero ring is one of the cyclos in a polycyclo ring
                  system
  612     .....Acyclic -C(=X)-, wherein X is chalcogen, attached directly
                or indirectly to the hetero ring by nonionic bonding
  613     ...Heavy metal or aluminum containing
  614     ...Plural azo groups attached indirectly to each other by
              nonionic bonding
  615     ...Plural nitrogens bonded directly to the same alkylene chain
              (e.g., diamino alkylene, etc.)
  616     ..Nitrogen oxide, other than as nitro or nitroso, containing
  617     ..Fiber- or substrate-reactive azo compound
  618     ...Formazan containing (i.e., HNH-N=CH-N=NH, whereinn
              substitution may be made for hydrogen only)
  619     ...Heavy metal or aluminum containing
  620     ....Halogen attached directly to a hetero ring or to an
               alicyclic ring by nonionic bonding
  621     .....Stilbene containing
  622     .....The hetero ring is six-membered and contains at least two
                nitrogens
  623     ......Diverse azo moieties bonded to the same metal
  624     ......At least two such hetero rings attached indirectly to each
                 other by nonionic bonding
  625     ......Plural azo groups in the same azo moiety attached
                 indirectly to each other by nonionic bonding
  626     ......Chalcogen or carbon bonded directly to the six-membered
                 hetero ring and is between the hetero ring and the azo
                 group
  627     ......Plural halogens attached directly to the hetero ring by
                 nonionic bonding
  628     ......Diverse hetero ring containing
  629     ....Alkylene, alkenyl or alkenylene bonded directly to sulfonyl
               or sulfonamide, which sulfonyl or sulfonamide is between a
               ring and the alkylene, alkenyl or alkenylene
  630     ...Halogen attached directly to a hetero ring or to an alicyclic
              ring by nonionic bonding
  631     ....Stilbene containing
  632     ....The hetero ring is six-membered and contains at least two
               nitrogens
  633     .....Polycyclo ring system having the hetero ring as one of the
                cyclos
  634     .....At least two such hetero rings attached indirectly to each
                other by nonionic bonding
  635     .....Additional hetero ring containing
  636     ......Pyrazole containing (including hydrogenated)
  637     .....Plural azo groups attached indirectly to each other by
                nonionic bonding
  638     .....The hetero ring and benzene ring, to which an azo group is
                bonded directly, bonded directly to the same nitrogen
  639     ...Aziridine containing (including unsaturated)
  640     ...Alkylene, alkenyl, alkenylene, alkynyl or alkynylene attached
              directly or indirectlyto a ring by nonionic bonding
  641     ....Alkylene, alkenyl or alkenylene bonded directly to sulfonyl
               or sulfonamido, which sulfonyl or sulfonamido is between a
               ring and the alkylene, alkenyl or alkenylene
  642     .....The alkylene, alkenyl or alkenylene and the ring are both
                bonded directly to the same sulfonyl group
  643     ....Alkylene, alkenyl or alkenylene bonded directly to
               carboxamido, urea or -C(=X)-, wherein X is chalcogen, which
               group is between a ring and the alkylene, alkenyl or
               alkenylene
  644     ....Alkylene, alkenyl or alkenylene and a ring bonded directly
               to the same chalcogen or to plural chalcogens which are
               bonded directly to each other
  645     ..Plural sulfonyl groups bonded directly to same amino nitrogen
             (e.g., sulfonylaminosulfonyl, etc.)
  646     ..Sulfonyl and carbonyl bonded directly to the same amino
             nitrogen (e.g., sulfonylaminocarbonyl, etc.)
  647     ..Plural amino nitrogens bonded directly to the same sulfonyl
             (e.g., aminosulfonylamino, etc.)
  648     ..Alkyl, having at least eight carbons specified, or plurall
             alkyl chains, each having at least five carbons specified,
             bonded directly to a ring, which ring is attached directly or
             indirectly to an acyclic carbon chain, which chain is bonded
             directly to a urea or carboxamide nitrogen that is between the
             chain and an additional ring
  649     ..Alkyl chain having at least eight carbons specified bonded
             directly to a ring
  650     ..Sulfonyl or -C(=X)-, wherein X is chalcogen, between a ring
             and an alkyl chain having at least eight carbons specified
  651     ...The sulfonyl or -C(=X)- is bonded directly to the ring
  652     ..Formazan containing (i.e., HNH-N=CH-N=NH, wherein substitution
             may be made for hydrogen only)
  653     ..Polycyclo carbocyclic ring system having at least three
             cyclos
  654     ...The polycyclo ring system consists of three six-membered
              cyclos and has plural oxygens bonded directly thereto
  655     ....Hetero ring containing
  656     ....At least two such ring systems having plural oxygens bonded
               directly thereto
  657     ...The polycyclo ring system has no azo group bonded directly
              thereto
  658     ...Chalcogen double bonded directly to the polycyclo ring
              system
  659     ..Bicyclo carbocyclic ring system consisting of a six-membered
             ring and a five-membered ring (e.g., indane, etc.
  660     ..Hydroxy and carbonyl of -C00- bonded directly to a monocyclic
             benzene ring (H or hydroxy may be replaced by a substituted or
             unsubstituted ammonium ion or a metal)
  661     ...Heavy metal or aluminum containing
  662     ....Hetero ring containing
  663     ....Plural azo groups in the same azo moiety attached indirectly
               to each other by nonionic bonding
  664     ...Hetero ring containing
  665     ....Azo bonded directly to the hetero ring or to a polycyclo
               ring system which contains the hetero ring as one of the
               cyclos
  666     ...At least three azo groups attached indirectly to each other
              by nonionic bonding
  667     ....Plural monocyclic benzene rings, each having hydroxy and
               carbonyl of -COO- bonded directly thereto
  668     ....Additional monocyclic benzene ring having plural hydroxy
               groups, hydroxy and nitrogen, or plural nitrogens bonded
               directly thereto, wherein the nitrogen is other than as
               nitro, nitroso or azo
  669     ....Additional -C(=X)-, wherein X is chalcogen
  670     ...Two azo groups attached indirectly to each other by nonionic
              bonding
  671     ....Sulfonic acid group containing (-(0=)S(=0)-OH, wherein H of
               -OH may be replaced by a substituted or unsubstituted
               ammonium ion or metal)
  672     .....Plural monocyclic benzene rings, each having hydroxy and
                carbonyl of -COO- bonded directly thereto
  673     .....Additional -C(=X)-, wherein X is chalcogen
  674     ...Sulfonic acid group containing (-(0=)S(=0)-OH, wherein H of
              -OH may be replaced by a substituted or unsubstituted
              ammonium ion or metal)
  675     ....Azo attached indirectly to the monocyclic benzene ring by
               nonionic bondingg
  676     ..Plural -HNH groups or -OH and -HNH bonded directly to a
             monocyclic benzene ring (H of -OH may be replaced by a
             substituted or unsubstituted ammonium ion or metal)
  677     ...Plural azo groups in the same azo moiety attached indirectly
              to each other by nonionic bonding
  678     ....Sulfonic acid group containing (-(0=)S(=0)-OH, wherein H of
               -OH may be replaced by a substituted or unsubstituted
               ammonium ion or metal)
  679     .....Plural monocyclic benzene rings, each having -OH and -HNH
                or plural -HNH groups bonded directly thereto
  680     .....Exactly three azo groups attached indirectly to each other
                by nonionic bonding
  681     ...Sulfonic acid group containing (-(0=)S(=0)-OH, wherein H of
              -OH may be replaced by a substituted or unsubstituted
              ammonium ion or metal)
  682     ..Plural hydroxy groups or esters thereof bonded directly to a
             monocyclic benzene ring (H of hydroxy may be replaced by a
             substituted or unsubstituted ammonium ion or metal)
  683     ...Azo bonded directly to the benzene ring
  684     ....Heavy metal or aluminum containing
  685     ....At least three azo groups attached indirectly to each other
               by nonionic bonding
  686     .....Hetero ring containing
  687     .....Plural monocyclic benzene rings, each having plural hydroxy
                groups or esters thereof bonded directly thereto
  688     ....Two azo groups attached indirectly to each other by nonionic
               bonding
  689     ..Stilbene containing
  690     ...Heavy metal or aluminum containing
  691     ...Hetero ring containing
  692     ..Heavy metal or aluminum containing
  693     ...Amine salt
  694     ...Arsenic containing
  695     ...Azo moiety and moiety which contains acyclic -CH=N- group
              bonded to the same metal
  696     ...Diverse azo moieties bonded to the same metal
  697     ....Hetero ring containing
  698     .....Hetero ring in each azo moiety
  699     ....Plural azo groups in the same azo moiety attached indirectly
               to each other by nonionic bonding
  700     ...Azo bonded directly to an acyclic carbon which is bonded
              directly to two acyclic carbons, each of which is double or
              triple bonded to an atom
  701     ...Hetero ring containing
  702     ....Polycyclo ring system containing the hetero ring as one of
               the cyclos
  703     .....Azo bonded directly to the polycyclo ring system
  704     ......The azo group is attached indirectly in the same azo
                 moiety to an additional azo group or to an acyclic chain
                 which contains a -CH=N- group by nonionic bonding
  705     ......Plural ring nitrogens in the polycyclo ring system
  706     ......Quinoline or isoquinoline containing (including
                 hydrogenated)
  707     ....Azo bonded directly to the hetero ring
  708     .....At least three azo groups in the same azo moiety attached
                indirectly to each other by nonionic bonding
  709     .....Two azo groups in the same azo moiety attached indirectly
                to each other by nonionic bondingg
  710     .....Pyrazole (including hydrogenated)
  711     ......Sulfonyl bonded directly to a ring
  712     .......Additional chalcogen bonded directly to the sulfonyl
  713     ...Benzene ring containing
  714     ....At least three azo groups in the same azo moiety attached
               indirectly to each other by nonionic bonding
  715     .....Plural monocyclic benzene rings attached directly to each
                other by nonionic bonding and are between azo groups
  716     ....Two azo groups in the same azo moiety attached indirectly to
               each other by nonionic bonding
  717     .....Containing -C(=X)-, wherein X is chalcogen (e.g., carbonyl,
                etc.)
  718     ......Plural monocyclic benzene rings attached directly or
                 indirectly to each other by acyclic nonionic bonding and
                 are between the azo groups
  719     .....Plural monocyclic benzene rings attached directly or
                indirectly to each other by acyclic nonionic bonding and
                are between the azo groups
  720     ....Containing -C(=X)-, wherein X is chalcogen (e.g., carbonyl,
               etc.)
  721     .....Nitrogen bonded directly to the -C(=X)- group (e.g.,
                carboxamide, etc.)
  722     ....Plural bicyclo carbocyclic ring systems bonded directly to
               the azo group
  723     ....Sulfonyl bonded directly to amino nitrogen (e.g.,
               sulfonamide, etc.)
  724     ....Sulfonic acid group containing (-(0=)S(=0)-OH, wherein H of
               -OH may be replaced by the ammonium ion or a metal)
  725     .....Amino nitrogen containing
  726     ..Boron or silicon containing
  727     ..Phosphorus attached indirectly to an azo group by nonionic
             bonding
  728     ..Amine salt
  729     ..Chain containing at least fifteen alkylene oxide groups
  730     ..Sulfonic acid ester group containing
  731     ...Hetero ring containing
  732     ..Nitrogen, other than as azo, and chalcogen or -C(=X)X- bonded
             directly to a -C(=X)- group, wherein the X's may be the same
             or diverse chalcogens (e.g., carbamic, allophanic, etc.)
  733     ...Hetero ring cntaining
  734     ..Halogen bonded directly to sulfur or to a -C(=X)- group,
             wherein X is chalcogen
  735     ..Containing acyclic -XCN or -NCX, wherein X is chalcogen (e.g.,
             thiocyanato, isocyanato, etc.)
  736     ..Thiosulfuric acid group containing (-S-(0=)S(=0)-OH, wherein H
             of the -OH may be replaced by the ammonium ion or Group IA or
             IIA light metal)
  737     ..Cyano and carbon bonded directly to acyclic nitrogen
  738     ..Acyclic chain which contains -CH=N- (substitution may be made
             for hydrogen only)
  739     ..Azo bonded directly to an acylic carbon which is bonded
             directly to two acyclic carbons, each of which is double or
             triple bonded to an atom
  740     ...Hetero ring or polycyclo ring system which contains a hetero
              ring as one of the cyclos bonded directly to an azo group
  741     ...Hetero ring attached indirectly to an azo group by nonionic
              bonding
  742     ....The acyclic carbon, to which the other two acyclic carbonss
               are bonded, is between the hetero ring and the azo group
  743     ...At least three azo groups attached indirectly to each other
              by nonionic bonding
  744     ...Two azo groups attached indirectly to each other by nonionic
              bonding
  745     ....Each azo group is bonded directly to an acyclic carbon which
               is bonded directly to two acyclic carbons, each of which is
               double or triple bonded to an atom
  746     .....Plural benzene rings bonded directly to each other and are
                between the azo groups
  747     ......Each benzene ring is bonded directly to an azo group
  748     .....Plural amino nitrogens bonded directly to a benzene ring
                which is between the azo groups
  749     ...Sulfonyl bonded directly to nitrogen
  750     ...Having -C(=X)-, wherein X is chalcogen, attached indirectly
              by nonionic bonding to the acyclic carbon to which the other
              two acyclic carbons are bonded
  751     ..Hetero ring containing
  752     ...Polycyclo ring system having a hetero atom shared by at least
              two rings or at least two hetero atoms which are not members
              of the same ring
  753     ...Azo bonded directly to the hetero ring or to a polycyclo ring
              system which contains the hetero ring as one of the cyclos
  754     ....At least three azo groups attached indirectly to each other
               by nonionic bonding
  755     .....Additional hetero ring or polycyclo ring system which
                contains a hetero ring as one of the cyclos bonded directly
                to an azo group
  756     ....Two azo groups attached indirectly to each other by nonionic
               bonding
  757     .....Additional hetero ring or polycyclo ring system which
                contains a hetero ring as one of the cyclos bonded directly
                to an azo group
  758     ......Both hetero rings or polycyclo ring systems are between
                 the azo groups
  759     ......Plural monocyclic benzene rings, each bonded directly to
                 an azo group, are between the azo groups
  760     .......The benzene rings are bonded directly to each other
  761     .....Both azo groups are bonded directly to the hetero ring or
                to the polycyclo ring system
  762     .....Polycyclo ring system having at least three cyclos, at
                least one of which is a hetero ring
  763     .....Bicyclo carbocyclic ring system
  764     .....Additional ring bonded directly to the hetero ring or to
                the polycyclo ring system
  765     ....Additional hetero ring or polycyclo ring system which
               contains a hetero ring as one of the cyclos bonded directly
               to the azo group
  766     .....The hetero ring is six-membered and contains nitrogen
                (e.g., pyridine, etc.)
  767     ......The hetero ring contains at least two nitrogens (e.g.,
                 pyrimidine, etc.)
  768     ......The hetero ring is in a bicyclo ring system (e.g.,
                 quinoline, benzomorpholine, etc.)
  769     .....Pyrazole (including hydrogenated)
  770     ....The hetero ring is six-membered and consists of one nitrogen
               and five carbons (e.g., pyridine, etc.)
  771     .....Acyclic oxygen bonded directly to the hetero ringg
  772     ......Plural acyclic chalcogens bonded directly to the hetero
                 ring at the two positions adjacent to the ring nitrogen
  773     .....Plural acyclic nitrogens, other than as nitro, nitroso or
                azo, bonded directly to the hetero ring at the two
                positions adjacent to the ring nitrogen
  774     ....Additional hetero ring attached indirectly to the azo group
               by nonionic bonding
  775     .....The additional hetero ring or a polycyclo ring system which
                contains the additional hetero ring as one of the cyclos is
                bonded directly to a ring, which ring is between the azo
                group and the additional hetero ring
  776     .....A ring and the additional hetero ring or a polycyclo ring
                system which contains the additional hetero ring as one of
                the cyclos are bonded directly to the same nitrogen
  777     .....The additional hetero ring or a polycyclo ring system which
                contains the additional hetero ring as one of the cyclos is
                bonded directly to an alkylene chain, which chain is
                between the azo group and the additional hetero ring
  778     ....Bicyclo carbocyclic ring system bonded directly to the azo
               group
  779     .....The bicyclo carbocyclic ring system is between the azo
                group and an additional carbocyclic ring
  780     .....Sulfonic acid group containing (-(0=)S(=0)-OH, wherein H of
                the -OH may be replaced by the ammonium ion or Group IA or
                IIA light metal)
  781     ....Sulfonic acid group containing (-(0=)S(=0)-OH, wherein H of
               the -OH may be replaced by the ammonium ion or a Group IA or
               IIA light metal)
  782     .....The hetero ring is one of the cyclos in a polycyclo ring
                system
  783     .....Additional sulfonyl containing
  784     ......Plural sulfonic acid groups
  785     .....Containing acyclic -C(=X)-, wherein X is chalcogen
  786     ......The -C(=X)- is bonded directly to nitrogen
  787     ....The hetero ring is one of the cyclos in a polycyclo ring
               system
  788     .....The hetero ring consists of sulfur, nitrogen and carbon
                (e.g., benzothiazole, etc.)
  789     .....Chalcogen double bonded directly to the hetero ring
  790     .....The hetero ring is five-membered and consists of one
                nitrogen and four carbons (e.g., indole, etc.)
  791     ....Carbocyclic ring bonded directly to the hetero ring or to
               the polycyclo ring system which contains the hetero ring
  792     .....Pyrazole containing (including hydrogenated)
  793     ......Sulfonyl containing
  794     ....Carbocyclic ring attached indirectly to the azo group by
               nonionic bonding
  795     ....The hetero ring is five-membered and contains at least one
               atom each of sulfur, nitrogen and carbon
  796     ...At least three azo groups attached indirectly to each other
              by nonionic bonding
  797     ...Two azo groups attached indirectly to each other by nonionic
              bonding
  798     ...Plural carbocyclic rings bonded directly to the azo group
  799     ....The hetero ring or a polycyclo ring system which contains
               the hetero ring as one of the cyclos is bonded directly to
               one of the carbocyclic rings or to a bicyclo ring system
               which contains the carbocyclic ring as one of the cylcoss
  800     .....The hetero ring is one of the cyclos in a polycyclo ring
                system
  801     ....The carbocyclic ring or a bicyclo ring system which contains
               the carbocyclic ring as one of the cyclos and the hetero
               ring or a polycyclo ring system which contains the hetero
               ring as one of the cyclos are bonded directly to the same
               carboxamide group
  802     ....The carbocyclic ring or a bicyclo ring system which contains
               the carbocyclic ring as one of the cyclos and the hetero
               ring or a polycyclo ring system which contains the hetero
               ring as one of the cyclos are bonded directly to the same
               nitrogen atom
  803     .....The hetero ring is six-membered and contains at least two
                nitrogens
  804     ....The hetero ring or a polycyclo ring system which contains
               the hetero ring as one of the cyclos is bonded directly to
               an alkylene chain, which chain is between the hetero ring
               and the carbocyclic ring
  805     ..Exactly five or exactly six azo groups attached indirectly to
             each other by nonionic bonding
  806     ..Exactly four azo groups attached indirectly to each other by
             nonionic bonding
  807     ...Plural nitrogens bonded directly to the same -C(=X)- group,
              wherein X is chalcogen (e.g., urea, thiourea, etc.)
  808     ...Benzidine containing
  809     ..Exactly three azo groups attached indirectly to each other by
             nonionic bonding
  810     ...Containing -C(=X)-, wherein X, is chalcogen or nitrogen
              (e.g., carbonyl, etc.)
  811     ....Nitrogen single bonded directly to the -C(=X)- group (e.g.,
               carboxamide, guanyl, etc.)
  812     .....Plural -C(=X)- groups containing
  813     ...Benzidine containing
  814     ....Hydroxy and nitrogen, other than as nitro, nitroso or azo,
               bonded directly to the same bicyclo ring system (H of
               hydroxy may be replaced by the ammonium ion or a Group IA or
               IIA light metal)
  815     ...Hydroxy bonded directly to a bicyclo ring system (H of
              hydroxy may be replaced by the ammonium ion or a Group IA or
              IIA light metal)
  816     ..Exactly two azo groups attached indirectly to each other by
             nonionic bonding
  817     ...Plural benzene rings bonded directly to the same urea or
              thiourea group and are between the azo groups
  818     ....Bicyclo ring system containing
  819     ...Plural benzene rings bonded directly to the same carboxamide
              or sulfonamide group and are between the azo groups
  820     ....Plural carboxamide groups between the azo groups
  821     ...Plural benzene rings bonded directly to the same chalcogen or
              -C(=X)- group, wherein X is chalcogen, and are between the
              azo groups
  822     ...Plural benzene rings bonded directly to each other and are
              between the azo groups
  823     ....Containing -C(=X)-, wherein X is chalcogen (e.g., carbonyl,
               etc.)
  824     ....Nitrogen, other than as nitro, nitroso or azo, attached
               indirectly to azo by nonionic bonding
  825     .....Plural nitrogens, other than as nitro, nitroso or azo,,
                attached indirectly to azo by nonionic bonding
  826     ......Plural sulfonic acid groups bonded directly to the same
                 bicyclo ring system (-(0=)S(=0)-OH, wherein H of the -OH
                 may be replaced by the ammonium ion or a Group IA or IIA
                 light metal)
  827     ...Hydroxy bonded directly to a bicyclo ring system which is
              between the azo groups (H of hydroxy may be replaced by a
              substituted or unsubstituted ammonium ion or a Group IA or
              IIA light metal)
  828     ....Plural bicyclo ring systems, each having hydroxy bonded
               directly thereto
  829     ...Containing -C(=X)-, wherein X is chalcogen (e.g., carbonyl,
              etc.)
  830     ....Hydroxy and the -C(=X)- are bonded directly to the same
               bicyclo ring system (H of hydroxy may be replaced by a
               substituted or unsubstituted ammonium ion or a Group IA or
               IIA light metal)
  831     ...Plural benzene rings bonded directly to each azo group
  832     ....At least one of the benzene rings is part of a bicyclo ring
               system
  833     .....Each of the benzene rings is part of a bicyclo ring system
  834     .....Hydroxy bonded directly to the bicyclo ring system (H of
                hydroxy may be replaced by the ammonium ion or a Group IA
                or IIA light metal)
  835     ......Plural bicyclo ring systems, each having hydroxy bonded
                 directly thereto
  836     ......Additional hydroxy or nitrogen, other than as nitro,
                 nitroso or azo, bonded directly to the bicyclo ring
                 system
  837     ......Sulfonic acid group bonded directly to the bicyclo ring
                 system (-(0=)S(=0) OH, wherein H of the -OH may be
                 replaced by the ammonium ion or a Group IA or IIA light
                 metal)
  838     ..Exactly one azo group containing or azo attached indirectly to
             an additional azo group by ionic bonding
  839     ...Plural benzene rings bonded directly to the azo group
  840     ....Each of the benzene rings is part of a bicyclo ring system
  841     .....Containing -C(=X)-, wherein X is chalcogen (e.g., carbonyl,
                etc.)
  842     .....Hydroxy bonded directly at the 2-position of the bicyclo
                ring system (H of hydroxy may be replaced by the ammonium
                ion or a Group IA or IIA light metal)
  843     ....Each of the benzene rings is monocyclic
  844     .....Sulfonyl containing
  845     ......Oxygen bonded directly to the sulfonyl group (e.g.,
                 sulfonic acid, etc.)
  846     .......Plural oxygens bonded directly to the sulfonyl group
                  (e.g., sulfuric acid, etc.)
  847     ......The sulfonyl is part of a sulfonamide group
                 (-(0=)S(=0)HNH, wherein substitution may be made for
                 hydrogen only)
  848     ......Containing -C(=X)-, wherein X is chalcogen
  849     .......The -C(=X)- is bonded directly to nitrogen, which
                  nitrogen is bonded directly to a ring
  850     .....Containing -C(=X)-, wherein X is chalcogen
  851     ......The -C(=X)- is bonded directly to one of the benezene
                 rings
  852     ......The -C(=X)- is in a -C(=X)X- group, wherein the X's may bee
                 the same or diverse chalcogens
  853     .......The -C(=X)X- is in a -C00H group (H of OH may be replaced
                  by the ammonium ion or a Group IA or IIA light metal)
  854     .......Additional -C(=X)- bonded directly to nitrogen, which
                  nitrogen is bonded directly to a ring
  855     ......Chalcogen, having no direct bond to a ring, attached
                 directly by a single bond to acyclic carbon
  856     .....Nitrogen, other than as nitro or nitroso, attached
                indirectly to the azo group by nonionic bonding
  857     ......Hydroxy bonded directly to acyclic carbon or carbon chain
                 (H of hydroxy may be replaced by the ammonium ion or Group
                 IA or IIA light metal)
  858     .......Plural chalcogens bonded directly to the acyclic carbon
                  or carbon chain
  859     ......Chalcogen bonded directly to a ring
  860     ....Acyclic -C(=X)- containing, wherein X is chalcogen (e.g.,
               carbonyl, etc.)
  861     .....Hydroxy bonded directly to a bicyclo ring system (H of
                hydroxy may be replaced by a substituted or unsubstituted
                ammonium ion or a Group IA or IIA light metal)
  862     ......Nitrogen bonded directly to the -C(=X)- group (e.g.,
                 carboxamide, etc.)
  863     .......The -C(=X)- is bonded directly to the bicyclo ring
                  system
  864     ........Sulfonyl containing
  865     ........Additional acyclic -C(=X)- group
  866     .........Additional nitrogen bonded directly to the additional
                    -C(=X)- group
  867     ..........At least three -C(=X)HNH groups, wherein substitution
                     may be made for hydrogen only
  868     ........Additional amino nitrogen
  869     ........Plural oxygens bonded directly to the same monocyclic
                   benzene ring
  870     ........Halogen, acyclic carbon, the azo group and an additional
                   halogen or acyclic carbon, all bonded directly to the
                   same benzene ring
  871     ........Acyclic carbon, carboxamide and chalcogen or an
                   additional acyclic carbon, all bonded directly to the
                   same benzene ring
  872     .......The nitrogen is additionally bonded directly to the
                  bicyclo ring system
  873     ........Additional acyclic -C(=X)- group
  874     ......The -C(=X)- is bonded directly to the bicyclo ring system
  875     ....Nitrogen, other than as nitro or nitroso, attached
               indirectly to the azo group by nonionic bonding
  876     .....Oxygen bonded directly to carbon
  877     ......The nitrogen and the oxygen are bonded directly to the
                 same bicyclo ring system
  878     .......Sulfonyl bonded directly to the bicyclo ring system
  879     ........Plural sulfonyl groups or plural nitrogens bonded
                   directly to the bicyclo ring system
  880     ........Additional sulfonyl which is attached indirectly to the
                   bicyclo ring system by nonionic bonding
  881     .....Sulfonyl and the nitrogen bonded directly to the same
                bicyclo ring system
  882     ....Oxygen double bonded directly to sulfur
  883     .....Sulfonyl bonded directly to a bicyclo ring system
  884     ......Plural sulfonyl groups bonded directly to the same bicycloo
                 ring system
  885     ...Benzene ring bonded directly to the azo group
  886     ...Containing -C(=X)-, wherein X is chalcogen (e.g., carbonyl,
              etc.)
  887     ..Purification or recovery