US PATENT SUBCLASS 528 / 52
.~.~.~ Material is organic nitrogen-containing compoud


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}
44  DF  .~ FROM REACTANT HAVING AT LEAST ONE -N=C=X GROUP (WHEREIN X IS A CHALCOGEN ATOM) AS WELL AS PRECURSORS THEREOF, E.G., BLOCKED ISOCYANATE, ETC. {17}
48  DF  .~.~ Process of polymerizing in the presence of a specified material other than reactant {5}
52.~.~.~ Material is organic nitrogen-containing compoud {1}
53  DF  .~.~.~.~> Organic nitrogen compound contains a nitrogen atom bonded to three atoms or carbon {1}


DEFINITION

Classification: 528/52

(under subclass 48) Subject matter wherein the specified material contains at least one nitrogen-containing organic compound.