US PATENT SUBCLASS 106 / 31.46
.~.~.~.~.~ 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}
31.27  DF  .~.~.~ Organic dye containing {10}
31.43  DF  .~.~.~.~ Organic nitrogen compound containing {5}
31.46.~.~.~.~.~ The nitrogen is a ring member of a heterocyclic ring {2}
31.47  DF  .~.~.~.~.~.~> Six-ring members in the heterocyclic ring {1}
31.49  DF  .~.~.~.~.~.~> Five-ring members in the heterocyclic ring {1}

DEFINITION

Classification: 106/31.46

The nitrogen is a ring member of a heterocyclic ring:

(under subclass 31.43) 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.