US PATENT SUBCLASS 528 / 314
.~.~.~.~ Material contains a nitrogen atom as a ring member of a heterocyclic ring other than where nitrogen heterocycle is solely part of a lactam ring

Current as of: June, 1999
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528 /   HD   SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {23}
271  DF  .~ FROM CARBOXYLIC ACID OR DERIVATIVE THEREOF {10}
310  DF  .~.~ From imide- or lactam-containing compound, or from an amino-nitrogen containing carboxylic acid, or derivative of an amino-nitrogen-containing carboxylic acid {9}
312  DF  .~.~.~ Polymerizing in the presence of a specified material other than reactant {8}
314.~.~.~.~ Material contains a nitrogen atom as a ring member of a heterocyclic ring other than where nitrogen heterocycle is solely part of a lactam ring

DEFINITION

Classification: 528/314

(under subclass 312) Subject matter wherein the specified material contains at least one nitrogen atom as a ring member of a heterocyclic ring with the proviso that the sole heterocyclic ring is not a lactam.

SEE OR SEARCH CLASS

520, Synthetic Resins or Natural Rubbers, see the Glossary for a definition of the term "heterocyclic".