US PATENT SUBCLASS 525 / 69
.~.~.~.~ Solid graft or graft-type copolymer contains backbone derived from ethylenic reactants only

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}
63  DF  .~.~.~ Mixing of solid graft or graft-type copolymer with other solid polymer wherein one of said solid polymers is not derived from ethylenic reactants only; mixing of said polymer mixture with a chemical treating agent; or mixing of graft or graft-type copolymer with a SICP or SPFI; or processes of forming or reacting; or the resultant product of any of the above operations {2}
69.~.~.~.~ Solid graft or graft-type copolymer contains backbone derived from ethylenic reactants only

DEFINITION

Classification: 525/69

Solid graft of graft-type copolymer contains backbone derived from ethylenic reactants only:

(under subclass 63) Subject matter wherein the graft copolymer substrate is derived from ethylenically unsaturated reactants only, e.g., epsilon-caprolactone graft polymerized onto styrene-2-hydroxyethyl methacrylate copolymer, etc.