US PATENT SUBCLASS 534 / 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)

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  DF  .~.~.~.~ At least one of the benzene rings is part of a bicyclo ring system {2}
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}
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)

DEFINITION

Classification: 534/837

(under subclass 834) Compounds wherein a --OH group is bonded directly to the bicyclo ring system, wherein H of the -OH may be replaced by the ammonium ion or a Group IA or IIA light metal.

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