US PATENT SUBCLASS 526 / 260
.~.~.~ 5- or 6-membered nitrogen ring compound having at least one oxygen in the 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  DF  .~.~ From monomer containing nitrogen atom as part of a heterocyclic ring {6}
260.~.~.~ 5- or 6-membered nitrogen ring compound having at least one oxygen in the ring

DEFINITION

Classification: 526/260

(under subclass 258) Subject matter wherein the ring system contains five or six atoms and at least one of the atoms besides carbon and nitrogen, is oxygen.

SEE OR SEARCH THIS CLASS, SUBCLASS:

275+, for a ring compound containing a phosphorous atom in the ring.