US PATENT SUBCLASS 526 / 280
.~.~ From fused or bridged ring containing monomer

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.~.~ From fused or bridged ring containing monomer {2}
281  DF  .~.~.~> Bridged monomer {2}
284  DF  .~.~.~> Contains an exterior ethylenic substituent bonded directly or indirectly to a single carbon atom of the fused ring system

DEFINITION

Classification: 526/280

(under subclass 72) Subject matter wherein a single

carboxyclic ring is attached at two different carbon atoms of its nuclear skeleton to a methylene carbon atom, or substituted methylene group, or chain of methylene carbon atoms, or substituted methylene carbon atoms, which carbon atom or chain of carbon atoms when taken together with the attached nuclear carbon atoms of the carbocyclic ring forms an additional ring structure (e.g., polycyclic terpenes, etc.).

(1) Note. A bridged monomer for purposes of this subclass requires that two separate and discrete methylene groups, or substituted methylene groups, or chain of methylene carbon atoms, or substituted methylene carbon atoms be present in a molecule, one of said methylene groups or chain thereof being those nuclear carbon atoms between the two different attached carbon atoms of the original nuclear carbon atoms of the carbocyclic ring, and the second methylene group or chain thereof being those carbon atoms that are joined to the original nuclear carbon atoms of the carbocyclic ring so as to form the additional ring structure.

(2) Note. A fused ring monomer for purposes of this subclass requires a carbocyclic nucleus which is attached at two of its adjacent nuclear carbon atoms to a methylene group, or substituted methylene group, or to a chain of methylene carbon atoms, or a chain of substituted methylene carbon atoms, so that the adjoined carbon atoms form a carbocyclic ring which is in addition to the original carbocyclic ring.