US PATENT SUBCLASS 131 / 278
.~.~.~ Containing nitrogen as hetro atom

Current as of: June, 1999
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131 /   HD   TOBACCO

274  DF  PRODUCT OR DEVICE HAVING IDENTIFIABLE CONSTITUENT TO FLAVOR OR ENHANCE FLAVOR {2}
276  DF  .~ Organic compound {2}
277  DF  .~.~ Heterocyclic {1}
278.~.~.~ Containing nitrogen as hetro atom

DEFINITION

Classification: 131/278

Containing nitrogen as a hetro atom:

(under subclass 277) Product or device wherein one of the atoms in the ring is a nitrogen atom.