US PATENT SUBCLASS 528 / 53
.~.~.~.~ Organic nitrogen compound contains a nitrogen atom bonded to three atoms or carbon

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  DF  .~.~.~ Material is organic nitrogen-containing compoud {1}
53.~.~.~.~ Organic nitrogen compound contains a nitrogen atom bonded to three atoms or carbon {1}
54  DF  .~.~.~.~.~> Nitrogen compound wherein nitrogen atom is bonded to three atoms of carbon contains a bridged- or fused-ring system, e.g., triethylene diamine, etc.

DEFINITION

Classification: 528/53

(under subclass 52) Subject matter wherein the organic nitrogen-containing compound possesses at least one trivalent nitrogen atom which is bonded to three atoms of carbon i.e.,( C )3N