US PATENT SUBCLASS 524 / 503
.~.~.~.~.~ Polyvinyl alcohol or modified form thereof

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


524 /   HD   SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {1}
*  DD  .~ 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 (Class 523, subclass 1) {17}
1  DF  .~.~ Adding a NRM to a preformed solid polymer or preformed specified intermediate condensation product, composition thereof; or process of treating or composition thereof {31}
500  DF  .~.~.~ Containing two or more solid polymers; solid polymer or SICP and a SICP, SPFI, or an ethylenic reactant or product thereof {7}
502  DF  .~.~.~.~ At least one solid polymer derived from ethylenic reactants only {11}
503.~.~.~.~.~ Polyvinyl alcohol or modified form thereof

DEFINITION

Classification: 524/503

Polyvinyl alcohol:

(under subclass 502) Subject matter wherein a solid polymer containing vinyl alcohol units and an additional solid polymer, SICP, SPFI, or ethylenic reactant is admixed with a NRM.

(1) Note. A vinyl alcohol-containing polymer requires at least three CH2-CH-OH groups in the polymer chain.

(2) Note. Vinyl alcohol polymers for the most part herein are prepared by the partial hydrolysis or saponification of polymers of vinyl esters, particularly homo- or interpolymeric-vinyl acetate.

SEE OR SEARCH THIS CLASS, SUBCLASS:

557, for a NRM in admixture with polyvinyl alcohol when there is no additional solid polymer, SICP, SPFI, or ethylenic reactant.