US PATENT SUBCLASS 534 / 825
.~.~.~.~.~ Plural nitrogens, other than as nitro, nitroso or azo, attached indirectly to azo 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}
816  DF  .~.~ Exactly two azo groups attached indirectly to each other by nonionic bonding {7}
822  DF  .~.~.~ Plural benzene rings bonded directly to each other and are between the azo groups {2}
824  DF  .~.~.~.~ Nitrogen, other than as nitro, nitroso or azo, attached indirectly to azo by nonionic bonding {1}
825.~.~.~.~.~ Plural nitrogens, other than as nitro, nitroso or azo, attached indirectly to azo by nonionic bonding {1}
826  DF  .~.~.~.~.~.~> Plural sulfonic acid groups bonded directly to the same bicyclo ring system (-(0=)S(=0)-OH, wherein H of the -OH may be replaced by the ammonium ion or a Group IA or IIA light metal)

DEFINITION

Classification: 534/825

(under subclass 824) Compounds wherein at least two nitrogens, other than as nitro, nitroso or azo groups, are attached indirectly to azo by nonionic bonding.

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