US PATENT SUBCLASS 44 / 335
.~.~.~ Plural nitrogens in the hetero ring (e.g., piperazines, 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}
329  DF  .~ Heterocyclic carbon compound containing a hetero ring having chalcogen or nitrogen as the only ring hetero atoms {6}
333  DF  .~.~ The hetero ring contains six members including nitrogen and carbon {5}
335.~.~.~ Plural nitrogens in the hetero ring (e.g., piperazines, etc.) {1}
336  DF  .~.~.~.~> Triazine or 1,3-diazine

DEFINITION

Classification: 44/335

Plural nitrogens in the hetero ring (e.g., piperazines, etc.):

(under subclass 333) Compositions wherein the six-membered hetero ring has plural nitrogen ring members.

(1) Note. Many of the ingredients provided for herein are piperazine compounds. Piperazine, per se, has the structure: [figure]