US PATENT SUBCLASS 44 / 437
.~.~ The oxygen is part of a -C(=O)- group

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}
436  DF  .~ Organic oxygen compound containing (e.g., alicyclic alcohols, hypochlorites, etc.) {9}
437.~.~ The oxygen is part of a -C(=O)- group {2}
438  DF  .~.~.~> With alkanol or dialkyl ether
439  DF  .~.~.~> Acyclic ketone

DEFINITION

Classification: 44/437

The oxygen is part of a -C(=O)- group:

(under subclass 436) Compositions wherein the organic compound has the oxygen present as a carbonyl group, -C(=O)-.

(1) Note. Examples of ingredients provided for herein are aldehydes, aromatic ketones, and carboxylic acid halides.