US PATENT SUBCLASS 525 / 333.3
.~.~.~.~ Polymer derived from aromatic hydrocarbon monomer, e.g., styrene, etc.

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}
333.3.~.~.~.~ Polymer derived from aromatic hydrocarbon monomer, e.g., styrene, etc. {3}
333.4  DF  .~.~.~.~.~> Halogenated polymer
333.5  DF  .~.~.~.~.~> Sulfur containing chemical treating agent
333.6  DF  .~.~.~.~.~> Nitrogen containing chemical treating agent

DEFINITION

Classification: 525/333.3

Polymer derived from aromatic hydrocarbon monomer, e.g., styrene, etc.:

(under subclass 326.1) Product wherein the chemically modified solid polymer has been derived from an ethylenically unsaturated aromatic hydrocarbon monomer.