US PATENT SUBCLASS 534 / 839
.~.~.~ Plural benzene rings bonded directly to the azo group


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.~.~.~ Plural benzene rings bonded directly to the azo group {5}
840  DF  .~.~.~.~> Each of the benzene rings is part of a bicyclo ring system {2}
843  DF  .~.~.~.~> Each of the benzene rings is monocyclic {3}
860  DF  .~.~.~.~> Acyclic -C(=X)- containing, wherein X is chalcogen (e.g., carbonyl, etc.) {1}
875  DF  .~.~.~.~> Nitrogen, other than as nitro or nitroso, attached indirectly to the azo group by nonionic bonding {2}
882  DF  .~.~.~.~> Oxygen double bonded directly to sulfur {1}


DEFINITION

Classification: 534/839

(under subclass 838) Compounds wherein plural benzene rings are bonded directly to the azo group.

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