US PATENT SUBCLASS 528 / 502 R
.~.~ Physical treatment

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

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {23}
480  DF  .~ TREATING POLYMER CONTAINING MATERIAL OR TREATING A SOLID POLYMER OR A RESINIFIABLE INTERMEDIATE CONDENSATION PRODUCT {14}
502 R.~.~ Physical treatment {6}
502 A  DF  .~.~.~> Filtration
502 B  DF  .~.~.~> Stretching to alter polymer properties by elongation
502 C  DF  .~.~.~> Compression or pressure treatment
502 D  DF  .~.~.~> Centrifuge separation
502 E  DF  .~.~.~> Spray drying or atomization
502 F  DF  .~.~.~> Shearing to change polymer particle size or to change polymer properties

Unofficial Alpha Subclasses: R A B C D E F

DEFINITION

Classification: 528/502

(under subclass 480) Processes wherein the polymer or polymer-containing material is treated by the application of a physical force.

(1) Note. Generally the physical force which acts upon the material causes a deformation, flow, or breakdown of the material (e.g., cutting, comminuting, shearing, etc.).