US PATENT SUBCLASS 436 / 96
.~ Hetero-N

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

91  DF  HETEROCYCLIC CARBON COMPOUND (I.E., O, S, N, Se, Te, AS ONLY RING HETERO ATOM) {3}
96.~ Hetero-N {2}
97  DF  .~.~> Bile pigment
98  DF  .~.~> Plural nitrogen in the same ring (e.g., barbituates, creatinine, etc.) {1}

DEFINITION

Classification: 436/96

Hetero-N:

(under subclass 91) Subject matter in which the hetero ring contains only nitrogen as the hetero atom.

(1) Note. This subclass provides for hetero rings with multiple nitrogen ring atoms as well as ring system with

nitrogen in diverse rings.

(2) Note. Paraquat and phencyclidine would be provided for in this subclass as would nicotine or nicotinic acid.