US PATENT SUBCLASS 534 / 708
.~.~.~.~.~ At least three 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}
692  DF  .~.~ Heavy metal or aluminum containing {7}
701  DF  .~.~.~ Hetero ring containing {2}
707  DF  .~.~.~.~ Azo bonded directly to the hetero ring {3}
708.~.~.~.~.~ At least three azo groups in the same azo moiety attached indirectly to each other by nonionic bonding

DEFINITION

Classification: 534/708

(under subclass 707) Compounds in which at least three 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]