US PATENT SUBCLASS 534 / 818
.~.~.~.~ Bicyclo ring system containing

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}
816  DF  .~.~ Exactly two azo groups attached indirectly to each other by nonionic bonding {7}
817  DF  .~.~.~ Plural benzene rings bonded directly to the same urea or thiourea group and are between the azo groups {1}
818.~.~.~.~ Bicyclo ring system containing

DEFINITION

Classification: 534/818

(under subclass 817) Compounds which contain a bicyclo ring system.

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