US PATENT SUBCLASS 534 / 832
.~.~.~.~ At least one of the benzene rings is part of a bicyclo ring system

Current as of: June, 1999
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534 /   HD   ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES

*  DD  ORGANIC COMPOUNDS (CLASS 532, SUBCLASS 1) {8}
573  DF  .~ Azo {51}
816  DF  .~.~ Exactly two azo groups attached indirectly to each other by nonionic bonding {7}
831  DF  .~.~.~ Plural benzene rings bonded directly to each azo group {1}
832.~.~.~.~ At least one of the benzene rings is part of a bicyclo ring system {2}
833  DF  .~.~.~.~.~> Each of the benzene rings is part of a bicyclo ring system
834  DF  .~.~.~.~.~> 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) {3}

DEFINITION

Classification: 534/832

(under subclass 831) Compounds wherein at least one of the benzene rings is part of a bicyclo ring system.

(1) Note. An example of a compound provided for herein is: [figure]