US PATENT SUBCLASS 534 / 817
.~.~.~ Plural benzene rings bonded directly to the same urea or thiourea group and are between the azo groups

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


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.~.~.~ Plural benzene rings bonded directly to the same urea or thiourea group and are between the azo groups {1}
818  DF  .~.~.~.~> Bicyclo ring system containing

DEFINITION

Classification: 534/817

(under subclass 816) Compounds wherein between the azo groups are at least two benzene rings which are bonded directly to the same urea or thiourea group.

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