US PATENT SUBCLASS 534 / 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)

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}
751  DF  .~.~ Hetero ring containing {5}
753  DF  .~.~.~ Azo bonded directly to the hetero ring or to a polycyclo ring system which contains the hetero ring as one of the cyclos {11}
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) {3}
782  DF  .~.~.~.~.~> The hetero ring is one of the cyclos in a polycyclo ring system
783  DF  .~.~.~.~.~> Additional sulfonyl containing {1}
785  DF  .~.~.~.~.~> Containing acyclic -C(=X)-, wherein X is chalcogen {1}

DEFINITION

Classification: 534/781

(under subclass 753) Compounds which contain a --OH group bonded directly to carbon 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]