US PATENT SUBCLASS 106 / 31.76
.~.~.~.~.~ The nitrogen is a ring member of a heterocyclic ring

Current as of: June, 1999
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106 /   HD   COMPOSITIONS: COATING OR PLASTIC

*  DD  COATING OR PLASTIC COMPOSITIONS {40}
31.01  DF  .~ Marking {14}
31.13  DF  .~.~ Inks {6}
31.6  DF  .~.~.~ Pigment containing {9}
31.75  DF  .~.~.~.~ Organic nitrogen compound containing {3}
31.76.~.~.~.~.~ The nitrogen is a ring member of a heterocyclic ring {3}
31.77  DF  .~.~.~.~.~.~> Six-ring members in the heterocyclic ring
31.78  DF  .~.~.~.~.~.~> Five-ring members in the heteroyclic ring
31.79  DF  .~.~.~.~.~.~> Acyclic azo attached directly or indirectly to the heterocyclic ring by nonionic bonding

DEFINITION

Classification: 106/31.76

The nitrogen is a ring member of a heterocyclic ring:

(under subclass 31.75) Subject matter wherein a heterocyclic ring contains at least one nitrogen atom as a ring member.

(1) Note. A heterocyclic ring is a ring that contains only carbon and at least one ring hetero atom selected from nitrogen, oxygen, sulfur, selenium, or tellurium.