US PATENT SUBCLASS 534 / 758
.~.~.~.~.~.~ Both hetero rings or polycyclo ring systems are between the azo groups

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  DF  .~.~.~.~ 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}
758.~.~.~.~.~.~ Both hetero rings or polycyclo ring systems are between the azo groups

DEFINITION

Classification: 534/758

(under subclass 757) Compounds wherein between the azo groups are both hetero rings or both polycyclo ring systems.

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