US PATENT SUBCLASS 526 / 264
.~.~.~.~ Lactam monomer

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  DF  .~.~ From monomer containing nitrogen atom as part of a heterocyclic ring {6}
263  DF  .~.~.~ Nitrogen of ring is bonded directly or indirectly to extracyclic ethylenic moiety {1}
264.~.~.~.~ Lactam monomer

DEFINITION

Classification: 526/264

(under subclass 263) Subject matter wherein the nitrogen ring system contains only carbon atoms and a single nitrogen atom in the ring and wherein said N atom is bonded to a carbon atom in the ring which is doubly bonded to an extracyclic oxygen atom ( N) and there are no oxygen, sulfur, selenium, or tellurium atoms doubly bonded directly to any other carbon atoms of the ring system, e.g., [figure]