US PATENT SUBCLASS 534 / 813
.~.~.~ Benzidine containing

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  DF  .~.~ Exactly three azo groups attached indirectly to each other by nonionic bonding {3}
813.~.~.~ Benzidine containing {1}
814  DF  .~.~.~.~> Hydroxy and nitrogen, other than as nitro, nitroso or azo, bonded directly to the same bicyclo ring system (H of hydroxy may be replaced by the ammonium ion or a Group IA or IIA light metal)

DEFINITION

Classification: 534/813

(under subclass 809) Compounds which contain the group [see Fig. 1], wherein the benzene rings may be further substituted. [figure] [caption]FIGURE 1.

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