US PATENT SUBCLASS 534 / 784
.~.~.~.~.~.~ Plural sulfonic acid groups

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  DF  .~.~.~.~ 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}
783  DF  .~.~.~.~.~ Additional sulfonyl containing {1}
784.~.~.~.~.~.~ Plural sulfonic acid groups

DEFINITION

Classification: 534/784

(under subclass 783) Compounds which contain at least two

--OH groups bonded directly to carbon.

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