US PATENT SUBCLASS 526 / 268
.~.~.~ From cyclic ether which is bridged or fused to a ring system

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}
266  DF  .~.~ From monomer containing oxygen as part of a heterocyclic ring {5}
268.~.~.~ From cyclic ether which is bridged or fused to a ring system

DEFINITION

Classification: 526/268

(under subclass 266) Subject matter wherein a bridged or fused ring monomer contains an oxygen atom adjoining two carbons in the same bridged or fused ring system, with the proviso that the adjoined carbon atoms are not double bonded to oxygen, selenium, or tellurium, e.g., [figure] [figure] [caption]etc.

(1) Note. A bridged or fused ring system for purposes of this subclass requires that a ring system be attached at two different carbon atoms of its nuclear skeleton to an atom or chain of atoms which when taken together with the nuclear carbon atoms forms an additional ring structure.

SEE OR SEARCH THIS CLASS, SUBCLASS:

273, for an unsaturated compound containing an epoxy group.