US PATENT SUBCLASS 534 / 807
.~.~.~ Plural nitrogens bonded directly to the same -C(=X)- group, wherein X is chalcogen (e.g., urea, thiourea, 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}
806  DF  .~.~ Exactly four azo groups attached indirectly to each other by nonionic bonding {2}
807.~.~.~ Plural nitrogens bonded directly to the same -C(=X)- group, wherein X is chalcogen (e.g., urea, thiourea, etc.)

DEFINITION

Classification: 534/807

(under subclass 806) Compounds wherein plural nitrogens are bonded directly to the same N-- Ngroup, wherein X is

chalcogen (i.e., oxygen, sulfur, selenium or tellurium), e.g., N-- N.

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