US PATENT SUBCLASS 534 / 682
.~.~ Plural hydroxy groups or esters thereof bonded directly to a monocyclic benzene ring (H of hydroxy 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}
682.~.~ Plural hydroxy groups or esters thereof bonded directly to a monocyclic benzene ring (H of hydroxy may be replaced by a substituted or unsubstituted ammonium ion or metal) {1}
683  DF  .~.~.~> Azo bonded directly to the benzene ring {3}

DEFINITION

Classification: 534/682

(under subclass 573) Compounds wherein at least two -OH groups or esters thereof are bonded directly to a monocyclic benzene ring; wherein the -H of the -OH may be replaced by a substituted or unsubstituted ammonium ion, a metal or an ester radical.

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