US PATENT SUBCLASS 526 / 263
.~.~.~ Nitrogen of ring is bonded directly or indirectly to extracyclic ethylenic moiety

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


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.~.~.~ Nitrogen of ring is bonded directly or indirectly to extracyclic ethylenic moiety {1}
264  DF  .~.~.~.~> Lactam monomer

DEFINITION

Classification: 526/263

(under subclass 258) Subject matter wherein the nitrogen atom of a ring system is bonded either directly or indirectly to an extracyclic unsaturated group.

(1) Note. This subclass includes only directly bonded unsaturated groups as in C= C-or only indirectly unsaturated bonded groups as in CH2=C - C - and is not meant to include unsaturated groups which are bonded to nonnitrogen ring atoms, e.g., [figure]

(2) Note. Extracyclic as used herein is meant to exclude those compounds wherein the heterocyclic nitrogen compound contains unsaturation solely in the ring. The extracyclic unsaturation as required for this subclass can exist in a

ring compound which is bonded to the nitrogen atom of the ring either directly or indirectly.

SEE OR SEARCH THIS CLASS, SUBCLASS:

258+, for a nitrogen-containing heterocyclic monomer wherein the ethylenic unsaturation is linked indirectly to the nitrogen atom in a ring through other atoms in the heterocyclic ring system.