US PATENT SUBCLASS 44 / 417
.~.~ Plural nitrogens bonded directly to the same -C(=X)- group, wherein X is chalcogen (e.g., ureas, etc.)

Current as of: June, 1999
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44 /   HD   FUEL AND RELATED COMPOSITIONS

300  DF  LIQUID FUELS (EXCLUDING FUELS THAT ARE EXCLUSIVELY MIXTURES OF LIQUID HYDROCARBONS) {31}
412  DF  .~ Organic nitrogen compound containing {12}
417.~.~ Plural nitrogens bonded directly to the same -C(=X)- group, wherein X is chalcogen (e.g., ureas, etc.)

DEFINITION

Classification: 44/417

Plural nitrogens bonded directly to the same -C(=X)- group, wherein X is chalcogen (e.g., ureas, etc.).

(under subclass 412) Compositions wherein a -C(=X)- group, wherein X is chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is bonded directly to plural nitrogens.

(1) Note. Examples of ingredients provided for herein are: [figure]