US PATENT SUBCLASS 526 / 284
.~.~.~ Contains an exterior ethylenic substituent bonded directly or indirectly to a single carbon atom of the 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}
280  DF  .~.~ From fused or bridged ring containing monomer {2}
284.~.~.~ Contains an exterior ethylenic substituent bonded directly or indirectly to a single carbon atom of the fused ring system

DEFINITION

Classification: 526/284

(under subclass 280) Subject matter wherein the fused ring system contains at least one ethylenic group to which is directly bonded to a single carbon atom of the fused ring nucleus.

(1) Note. For purposes of this subclass, "directly or indirectly bonded" includes all ethylenic unsaturation which is external to the fused ring nucleus and which is bonded to the fused ring by a single nuclear carbon atom.

(2) Note. For purposes of this subclass a methylene group which is bonded to a nuclear carbon atom will suffice as being an external ethylenic group.