US PATENT SUBCLASS 534 / 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)

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}
676  DF  .~.~ 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) {2}
677  DF  .~.~.~ Plural azo groups in the same azo moiety attached indirectly to each other by nonionic bonding {1}
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) {2}
679  DF  .~.~.~.~.~> Plural monocyclic benzene rings, each having -OH and -HNH or plural -HNH groups bonded directly thereto
680  DF  .~.~.~.~.~> Exactly three azo groups attached indirectly to each other by nonionic bonding

DEFINITION

Classification: 534/678

(under subclass 677) Compounds which contain a --OH group bonded directly to carbon, wherein -H of the -OH may be replaced by a substituted or unsubstituted ammonium ion or a metal.

(1) Note. Examples of compounds provided for herein are: [figure] [figure]