US PATENT SUBCLASS 524 / 803
.~.~.~ Polyvinyl alcohol or partially hydrolyzed polyvinyl acetate or chemically modified forms thereof

Current as of: June, 1999
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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}
800  DF  .~.~ Preparation of intentional or desired composition by formation of solid polymer or SICP in the presence of water as a designated nonreactant material (DNRM), or products thereof {10}
803.~.~.~ Polyvinyl alcohol or partially hydrolyzed polyvinyl acetate or chemically modified forms thereof

DEFINITION

Classification: 524/803

Polyvinyl alcohol or partially hydrolyzed polyvinyl acetate or chemically modified forms thereof:

(under subclass 800) Subject matter wherein the intentional or desired composition, which is prepared by formation of a solid polymer or SICP in the presence of water, contains polyvinyl alcohol (PVA) or chemically modified PVA.

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