US PATENT SUBCLASS 534 / 840
.~.~.~.~ Each of the benzene rings is part of a bicyclo ring system


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}
840.~.~.~.~ Each of the benzene rings is part of a bicyclo ring system {2}
841  DF  .~.~.~.~.~> Containing -C(=X)-, wherein X is chalcogen (e.g., carbonyl, etc.)
842  DF  .~.~.~.~.~> Hydroxy bonded directly at the 2-position of the bicyclo ring system (H of hydroxy may be replaced by the ammonium ion or a Group IA or IIA light metal)


DEFINITION

Classification: 534/840

(under subclass 839) Compounds wherein each of the benzene rings is part of a bicyclo ring system.

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