US PATENT SUBCLASS 528 / 315
.~.~.~.~ Material is a nitrogen-containing compound other than a lactam

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}
315.~.~.~.~ Material is a nitrogen-containing compound other than a lactam

DEFINITION

Classification: 528/315

(under subclass 312) Subject matter wherein the specified material contains at least one nitrogen-containing compound.

(1) Note. A lactam utilized as a specified material is excluded herefrom and is classified below as a specified material on some other basis. A compound, however, which contains a nitrogen atom in addition to the nitrogen atom of a lactam ring is proper for this subclass.