US PATENT SUBCLASS 436 / 91
HETEROCYCLIC CARBON COMPOUND (I.E., O, S, N, Se, Te, AS ONLY RING HETERO ATOM)

Current as of: June, 1999
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436 /   HD   CHEMISTRY: ANALYTICAL AND IMMUNOLOGICAL TESTING

91HETEROCYCLIC CARBON COMPOUND (I.E., O, S, N, Se, Te, AS ONLY RING HETERO ATOM) {3}
92  DF  .~> Diverse hetero atoms in same or different rings (e.g., alkaloids, opiates, etc.)
93  DF  .~> Hetero-O (e.g., ascorbic acid, etc.) {1}
96  DF  .~> Hetero-N {2}

DEFINITION

Classification: 436/91

HETEROCYCLIC CARBON COMPOUND (I.E., O, S, N, Se, Te, AS ONLY RING HETERO ATOM):

(under the class definition) Subject matter involving the qualitative or quantitative chemical analysis of a carbon compound which contains a ring composed of carbon and at least one element from the group consisting of nitrogen, sulfur, selenium, tellurium or oxygen and not other atoms.

(1) Note. Included herein are analysis involving heterocyclic acid anhydrides, lactones or lactams.

SEE OR SEARCH CLASS

540, through 549, Organic Compounds, for processes of synthesis of heterocyclic carbon compounds.