US PATENT SUBCLASS 534 / 669
.~.~.~.~ Additional -C(=X)-, wherein X is chalcogen

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}
660  DF  .~.~ Hydroxy and carbonyl of -C00- bonded directly to a monocyclic benzene ring (H or hydroxy may be replaced by a substituted or unsubstituted ammonium ion or a metal) {5}
666  DF  .~.~.~ At least three azo groups attached indirectly to each other by nonionic bonding {3}
669.~.~.~.~ Additional -C(=X)-, wherein X is chalcogen

DEFINITION

Classification: 534/669

(under subclass 666) Compounds which contain an additional -- group, wherein X is chalcogen (i.e., oxygen, sulfur, selenium or tellurium).

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