US PATENT SUBCLASS 525 / 333.1
.~.~.~.~.~ Isoprene or diene rubber other than butadiene rubber

Current as of: June, 1999
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525 /   HD   SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {4}
50  DF  .~ MIXING OF TWO OR MORE SOLID POLYMERS; MIXING OF SOLID POLYMER OR SICP WITH SICP OR SPFI; MIXING OF SICP WITH AN ETHYLENIC AGENT; MIXING OF SOLID POLYMER WITH A CHEMICAL TREATING OR ETHYLENIC AGENT; OR PROCESSES OF FORMING OR REACTING; OR THE RESULTANT PRODUCT OF ANY OF THE ABOVE OPERATIONS {32}
55  DF  .~.~ At least one solid polymer derived from ethylenic reactants only {25}
326.1  DF  .~.~.~ Chemically after treated solid polymers derived from ethylenically unsaturated monomers only {24}
331.9  DF  .~.~.~.~ Polymer derived from monomer containing at least two ethylenic groups or diene rubber {7}
333.1.~.~.~.~.~ Isoprene or diene rubber other than butadiene rubber

DEFINITION

Classification: 525/333.1

Isoprene or diene rubber other than butadiene rubber:

(under subclass 331.9) Product wherein the solid polymer which has been chemically modified is described as a diene rubber other than butadiene or is derived from isoprene monomer.

(1) Note. For purposes of this subclass, materials nominally described as a rubber or elastomer are presumed to be a diene rubber other than butadiene.

SEE OR SEARCH THIS CLASS, SUBCLASS:

331.9, for a rubbery copolymer of Butadiene.

333.2, for a rubbery homopolymer of Butadiene.