US PATENT SUBCLASS 534 / 756
.~.~.~.~ Two azo groups 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}
751  DF  .~.~ Hetero ring containing {5}
753  DF  .~.~.~ Azo bonded directly to the hetero ring or to a polycyclo ring system which contains the hetero ring as one of the cyclos {11}
756.~.~.~.~ Two azo groups attached indirectly to each other by nonionic bonding {5}
757  DF  .~.~.~.~.~> Additional hetero ring or polycyclo ring system which contains a hetero ring as one of the cyclos bonded directly to an azo group {2}
761  DF  .~.~.~.~.~> Both azo groups are bonded directly to the hetero ring or to the polycyclo ring system
762  DF  .~.~.~.~.~> Polycyclo ring system having at least three cyclos, at least one of which is a hetero ring
763  DF  .~.~.~.~.~> Bicyclo carbocyclic ring system
764  DF  .~.~.~.~.~> Additional ring bonded directly to the hetero ring or to the polycyclo ring system


DEFINITION

Classification: 534/756

(under subclass 753) Compounds in which two azo groups are attached indirectly to each other by nonionic bonding.

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