US PATENT SUBCLASS 528 / 228
.~.~ With nitrogen-containing reactant

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}
220  DF  .~ FROM KETONE OR KETENE REACTANT {4}
228.~.~ With nitrogen-containing reactant {1}
229  DF  .~.~.~> Nitrogen-containing reactant contains an amine group

DEFINITION

Classification: 528/228

(under subclass 220) Subject matter wherein a ketone is reacted with at least one nitrogen-containing reactant.