US PATENT SUBCLASS 521 / 45.5
.~.~.~.~ Treating with mechanical action and in the absence of a chemically reactive additive or solvent


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

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {3}
40  DF  .~ PROCESS OF TREATING SCRAP OR WASTE PRODUCT CONTAINING SOLID ORGANIC POLYMER TO RECOVER A SOLID POLYMER THEREFROM {5}
40.5  DF  .~.~ Process of treating scrap or waste product containing at least one polymer derived from ethylenic unsaturated monomers only {3}
41  DF  .~.~.~ Treating rubber (or rubberlike materials) or polymer derived from a monomer having at least two ethylenic unsaturated moieties {6}
45.5.~.~.~.~ Treating with mechanical action and in the absence of a chemically reactive additive or solvent


DEFINITION

Classification: 521/45.5

Treating with mechanical action and in the absence of a chemically reactive additive or solvent:

(under subclass 41) Subject matter wherein the process involves mechanical action and wherein chemical active materials or solvents are not utilized.

(1) Note. Recovery of polymers solely by means of heat is considered to be mechanical action.

(2) Note. Although chemically active materials and solvents have been excluded herefrom, chemically nonactive additives which may effect the process are included, e.g., dyes, fillers, pigments, etc.