US PATENT SUBCLASS 526 / 259
.~.~.~ Nitrogen atom is part of a bridged or fused 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}
258  DF  .~.~ From monomer containing nitrogen atom as part of a heterocyclic ring {6}
259.~.~.~ Nitrogen atom is part of a bridged or fused ring system

DEFINITION

Classification: 526/259

(under subclass 258) Subject matter wherein the monomer contains a fused or bridged ring system, and wherein at least one atom thereof is nitrogen.

SEE OR SEARCH THIS CLASS, SUBCLASS:

280+, for a monomer containing nitrogen atom which is part of a bridged or fused ring compound and wherein the nitrogen atom is extracyclic to the ring system and for a more thorough definition of what is meant by a fused or bridged ring system.