US PATENT SUBCLASS 504 / 327
.~.~.~ Ureas or thioureas (i.e., HNH-C(=X)-HNH, wherein X is oxygen or sulfur and substitution may be made for hydrogen only)

Current as of: June, 1999
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504 /   HD   PLANT PROTECTING AND REGULATING COMPOSITIONS

116  DF  PLANT GROWTH REGULATING COMPOSITIONS (E.G., HERBICIDES, ETC.) {9}
189  DF  .~ Organic active compound containing {19}
326  DF  .~.~ Containing nitrogen, other than as nitro or nitroso, attached directly or indirectly to carbon by nonionic bonding {7}
327.~.~.~ Ureas or thioureas (i.e., HNH-C(=X)-HNH, wherein X is oxygen or sulfur and substitution may be made for hydrogen only) {3}
328  DF  .~.~.~.~> Nitrogen or -C(=X)- attached directly to urea or thiourea nitrogen by nonionic bonding (e.g., biurets, semicarbazones, etc.)
329  DF  .~.~.~.~> Sulfur attached directly or indirectly to urea or thiourea nitrogen by nonionic bonding
330  DF  .~.~.~.~> Benzene ring attached directly or indirectly to urea or thiourea nitrogen by nonionic bonding {2}

DEFINITION

Classification: 504/327

Ureas or thioureas (i.e., HNH-C (=X)-HNH, wherein X is oxygen or sulfur and substitution may be made for hydrogen only):

(under subclass 326) Compositions which contain HNH-C(=X)-HNH, wherein X is oxygen or sulfur and substitution may be made for hydrogen only.

(1) Note. Isoureas, isothioureas, pseudoureas, and pseudothioureas are not provided for in this subclass.