US PATENT SUBCLASS 534 / 809
.~.~ Exactly 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}
809.~.~ Exactly three azo groups attached indirectly to each other by nonionic bonding {3}
810  DF  .~.~.~> Containing -C(=X)-, wherein X, is chalcogen or nitrogen (e.g., carbonyl, etc.) {1}
813  DF  .~.~.~> Benzidine containing {1}
815  DF  .~.~.~> Hydroxy bonded directly to a bicyclo ring system (H of hydroxy may be replaced by the ammonium ion or a Group IA or IIA light metal)

DEFINITION

Classification: 534/809

(under subclass 573) Compounds in which exactly three azo groups are attached indirectly to each other by nonionic bonding.

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