US PATENT SUBCLASS 514 / 590
.~.~.~ Carbazides or semicarbazides (i.e., N-N-C(=O)-N containing)

Current as of: June, 1999
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514 /   HD   DRUG, BIO-AFFECTING AND BODY TREATING COMPOSITIONS

1  DF  DESIGNATED ORGANIC ACTIVE INGREDIENT CONTAINING (DOAI) {29}
579  DF  .~ Nitrogen containing other than solely as a nitrogen in an inorganic ion of an addition salt, a nitro or a nitroso DOAI {22}
588  DF  .~.~ Ureas (i.e., N-C(=O)-N) {6}
590.~.~.~ Carbazides or semicarbazides (i.e., N-N-C(=O)-N containing)

DEFINITION

Classification: 514/590

Carbazides or semicarbazides (i.e., N-N-C (=O)-N) containing:

(under subclass 588) Subject matter containing carbazides or semicarbazides having the grouping N-N--N-N or N-N--N, respectively.