US PATENT SUBCLASS 534 / 685
.~.~.~.~ At least three azo groups attached indirectly to each other by nonionic bonding

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  DF  .~.~ 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}
685.~.~.~.~ At least three azo groups attached indirectly to each other by nonionic bonding {2}
686  DF  .~.~.~.~.~> Hetero ring containing
687  DF  .~.~.~.~.~> Plural monocyclic benzene rings, each having plural hydroxy groups or esters thereof bonded directly thereto

DEFINITION

Classification: 534/685

(under subclass 683) Compounds in which at least two azo groups are attached indirectly to each other by nonionic bonding.

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