US PATENT SUBCLASS 44 / 431
.~.~.~.~ Plural rings bonded to the same nitrogen atom

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}
426  DF  .~.~ Benzene ring bonded directly to the nitrogen {3}
430  DF  .~.~.~ Plural nitrogens bonded to the same benzene {1}
431.~.~.~.~ Plural rings bonded to the same nitrogen atom

DEFINITION

Classification: 44/431

Plural rings bonded to the same nitrogen atom:

(under subclass 430) Compositions wherein a nitrogen is bonded directly to plural rings.

(1) Note. An example of an ingredient provided for herein is: [figure]