US PATENT SUBCLASS 526 / 258
.~.~ From monomer containing nitrogen atom as part of a heterocyclic ring

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

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {8}
72  DF  .~ POLYMERS FROM ONLY ETHYLENIC MONOMERS OR PROCESSES OF POLYMERIZING, POLYMERIZABLE COMPOSITIONS CONTAINING ONLY ETHYLENIC MONOMERS AS REACTANTS OR PROCESSES OF PREPARING {43}
258.~.~ From monomer containing nitrogen atom as part of a heterocyclic ring {6}
259  DF  .~.~.~> Nitrogen atom is part of a bridged or fused ring system
260  DF  .~.~.~> 5- or 6-membered nitrogen ring compound having at least one oxygen in the ring
261  DF  .~.~.~> Three or more nitrogen atoms in a single ring
262  DF  .~.~.~> Imide monomer
263  DF  .~.~.~> Nitrogen of ring is bonded directly or indirectly to extracyclic ethylenic moiety {1}
265  DF  .~.~.~> 6-membered ring contains a single nitrogen atom

DEFINITION

Classification: 526/258

(under subclass 72) Subject matter wherein an unsaturated monomer contains one or more carbon atoms covalently bonded in a ring system with at least one hetero atom or oxygen, nitrogen, selenium or tellurium and there are no other atoms in the ring, with the proviso that at least one of the hetero atoms is nitrogen.