US PATENT SUBCLASS 44 / 352
.~.~.~ Ring carbons of the hetero ring are unsubstituted or hydrocarbyl substituted only

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


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}
350  DF  .~.~ The hetero ring contains five members including carbon and chalcogen {2}
352.~.~.~ Ring carbons of the hetero ring are unsubstituted or hydrocarbyl substituted only

DEFINITION

Classification: 44/352

Ring carbons of the hetero ring are unsubstituted or hydrocarbyl substituted only:

(under subclass 350) Compositions in which the ring carbons of the five-membered hetero ring may be unsubstituted or hydrocarbyl substituted only.

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