US PATENT SUBCLASS 514 / 588
.~.~ Ureas (i.e., N-C(=O)-N)


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.~.~ Ureas (i.e., N-C(=O)-N) {6}
589  DF  .~.~.~> Nitro or nitroso bonded directly to amino nitrogen (e.g., nitramine, nitrosamine, nitro-urea, etc.)
590  DF  .~.~.~> Carbazides or semicarbazides (i.e., N-N-C(=O)-N containing)
591  DF  .~.~.~> Biurets (i.e., N-C(=O)-N-C(=O)-N)
592  DF  .~.~.~> Sulfur attached directly to urea nitrogen by nonionic bonding {1}
594  DF  .~.~.~> Additional C=O bonded directly to urea nitrogen
595  DF  .~.~.~> Benzene ring containing {1}


DEFINITION

Classification: 514/588

Ureas (i.e., N-C(=O)N:

(under subclass 579) Subject matter which contains the grouping NN.

(1) Note. This subclass contains, for example, adducts of urea with inorganic compounds such as hydrogen peroxide or calcium nitrate.