US PATENT SUBCLASS 526 / 77
.~.~ Including step of purifying 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}
77.~.~ Including step of purifying monomer

DEFINITION

Classification: 526/77

(under subclass 72) Subject matter which includes the step of purifying the ethylenic monomer.

(1) Note. Purification for this subclass may be for any number of reasons (e.g., removing impurities which inhibit polymerization, removing impurities which may be undesirable in the final polymer, etc.).

(2) Note. Included in this subclass are processes involving physical treatments (e.g., distillation, sorbent extraction, etc.) as well a processes involving chemical interaction of the impurity or undesired constituents.

SEE OR SEARCH THIS CLASS, SUBCLASS:

75, for processes of chemically modifying a monomer or prepolymer.

SEE OR SEARCH CLASS 528, Synthetic Resins or Natural Rubbers,

480+, for processes of purifying a polymer by either a chemical or physical process.