US PATENT SUBCLASS 525 / 98
.~.~.~.~.~ Solid block or block-type copolymer derived from reactant containing plural unsaturation

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}
88  DF  .~.~.~ Mixing of solid block or block-type copolymer with other solid polymer; mixing of said polymer mixture with a chemical treating agent; mixing of a block or block-type copolymer with SICP or with SPFI; or processes of forming or reacting; or the resultant product of any of the above operations {5}
95  DF  .~.~.~.~ Mixture contains solid block or block-type copolymer derived from ethylenically unsaturated hydrocarbon reactants only at least one of which contains at least four carbon atoms {3}
98.~.~.~.~.~ Solid block or block-type copolymer derived from reactant containing plural unsaturation {1}
99  DF  .~.~.~.~.~.~> With solid polymer derived from reactant containing plural unsaturation

DEFINITION

Classification: 525/98

Solid block or block-type copolymer derived reactant containing plural unsaturation:

(under subclass 95) Subject matter wherein the block or block-type copolymer is derived from a plural ethylenically unsaturated reactant, e.g., a mixture of polystyrene with block (polybutadiene-polystyrene), etc.