US PATENT SUBCLASS 534 / 856
.~.~.~.~.~ Nitrogen, other than as nitro or nitroso, attached indirectly to the azo group 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}
838  DF  .~.~ Exactly one azo group containing or azo attached indirectly to an additional azo group by ionic bonding {3}
839  DF  .~.~.~ Plural benzene rings bonded directly to the azo group {5}
843  DF  .~.~.~.~ Each of the benzene rings is monocyclic {3}
856.~.~.~.~.~ Nitrogen, other than as nitro or nitroso, attached indirectly to the azo group by nonionic bonding {2}
857  DF  .~.~.~.~.~.~> Hydroxy bonded directly to acyclic carbon or carbon chain (H of hydroxy may be replaced by the ammonium ion or Group IA or IIA light metal) {1}
859  DF  .~.~.~.~.~.~> Chalcogen bonded directly to a ring

DEFINITION

Classification: 534/856

(under subclass 843) Compounds wherein nitrogen, other than as nitro or nitroso, is attached indirectly to the azo group by nonionic bonding.

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