US PATENT SUBCLASS 44 / 329-- .~ Heterocyclic carbon compound containing a hetero ring having chalcogen or nitrogen as the only ring hetero atoms

US PATENT SUBCLASS 44 / 329
.~ Heterocyclic carbon compound containing a hetero ring having chalcogen or nitrogen as the only ring hetero atoms

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		.~ Heterocyclic carbon compound containing a hetero ring having chalcogen or nitrogen as the only ring hetero atoms {6}
330	DF	.~.~> Compound of indeterminate structure prepared by reacting a heterocyclic compound of known structure {2}
333	DF	.~.~> The hetero ring contains six members including nitrogen and carbon {5}
340	DF	.~.~> The hetero ring contains five members including nitrogen and carbon (e.g., pyrrolidones, porphines, etc.) {4}
349	DF	.~.~> The hetero ring contains six members including carbon and chalcogen (e.g., six-membered sorbitans, ketone peroxides, etc.)
350	DF	.~.~> The hetero ring contains five members including carbon and chalcogen {2}
353	DF	.~.~> The hetero ring contains three or four members

DEFINITION

Classification: 44/329

Heterocyclic carbon compound containing a hetero ring having chalcogen or nitrogen as the only ring hetero atoms:

(under subclass 300) Compositions which contain a compound having a heterocyclic ring whose ring members are carbon and at least one hetero atom selected from nitrogen and chalcogen (i.e., oxygen, sulfur, selenium, and tellurium).

(1) Note. Examples of ingredients provided for herein are heterocyclic ring compounds wherein seven or more ring members are present in the hetero ring.