US PATENT SUBCLASS 523 / 332
.~.~ Extracting material from solid polymer latex or aqueous dispersion or suspension with a liquid nonreactant material, e.g., solvent stripping, coprecipitation, etc.

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

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {1}
1  DF  .~ PROCESSES OF PREPARING A DESIRED OR INTENTIONAL COMPOSITION OF AT LEAST ONE NONREACTANT MATERIAL AND AT LEAST ONE SOLID POLYMER OR SPECIFIED INTERMEDIATE CONDENSATION PRODUCT, OR PRODUCT THEREOF {71}
332.~.~ Extracting material from solid polymer latex or aqueous dispersion or suspension with a liquid nonreactant material, e.g., solvent stripping, coprecipitation, etc.

DEFINITION

Classification: 523/332

Extracting material from solid polymer latex or aqueous dispersion or suspension with a liquid nonreactant material, e.g., solvent stripping coprecipitation, etc.:

(under subclass 1) Process wherein a solid polymer latex or aqueous dispersion is extracted with a liquid solvent to remove material.

(1) Note. The product of this process must be a product proper for this class, i.e., an intentional or desired composition.

(2) Note. The liquid solvent need not be a solvent for the solid polymer but merely a liquid nonreactant which serves as an extractant for the material being removed.

(3) Note. The extraction step relates to removal of material which is dissolved or dispersed in the extractant liquid.