US PATENT SUBCLASS 534 / 810
.~.~.~ Containing -C(=X)-, wherein X, is chalcogen or nitrogen (e.g., carbonyl, etc.)

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}
809  DF  .~.~ Exactly three azo groups attached indirectly to each other by nonionic bonding {3}
810.~.~.~ Containing -C(=X)-, wherein X, is chalcogen or nitrogen (e.g., carbonyl, etc.) {1}
811  DF  .~.~.~.~> Nitrogen single bonded directly to the -C(=X)- group (e.g., carboxamide, guanyl, etc.) {1}

DEFINITION

Classification: 534/810

(under subclass 809) Compounds which contain a -- group, wherein X is nitrogen or chalcogen (i.e., oxygen, sulfur, selenium or tellurium).

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