US PATENT SUBCLASS 534 / 667
.~.~.~.~ Plural monocyclic benzene rings, each having hydroxy and carbonyl of -COO- bonded directly thereto

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}
660  DF  .~.~ Hydroxy and carbonyl of -C00- bonded directly to a monocyclic benzene ring (H or hydroxy may be replaced by a substituted or unsubstituted ammonium ion or a metal) {5}
666  DF  .~.~.~ At least three azo groups attached indirectly to each other by nonionic bonding {3}
667.~.~.~.~ Plural monocyclic benzene rings, each having hydroxy and carbonyl of -COO- bonded directly thereto

DEFINITION

Classification: 534/667

(under subclass 666) Compounds which contain at least two monocyclic benzene rings, each of which has an -OH group and a -COO- group bonded directly to it.

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