US PATENT SUBCLASS 534 / 663
.~.~.~.~ Plural azo groups in the same azo moiety 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}
660  DF  .~.~ Hydroxy and carbonyl of -C00- bonded directly to a monocyclic benzene ring (H or hydroxy may be replaced by a substituted or unsubstituted ammonium ion or a metal) {5}
661  DF  .~.~.~ Heavy metal or aluminum containing {2}
663.~.~.~.~ Plural azo groups in the same azo moiety attached indirectly to each other by nonionic bonding

DEFINITION

Classification: 534/663

(under subclass 661) Compounds wherein at least two azo groups within the same azo moiety are attached indirectly to each other by nonionic bonding.

(1) Note. The term "azo moiety" as used herein is intended to include singularly each of the azo compounds which complex with a heavy metal in the formation of a sandwich-type compound.

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