The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 02, 1993
Filed:
Aug. 30, 1991
Nippon Gohsei Kagaku Kogyo Kabushiki Kaisha, Osaka, JP;
Abstract
A method for melt-molding a water-soluble vinyl alcohol polymer which includes melt-molding a water-soluble oxyalkylene group-containing vinyl alcohol copolymer under substantially anhydrous conditions and substantially without use of plasticizer, the copolymer having a vinyl alcohol unit (A), a vinyl ester unit (B) and an oxyalkylene ether unit (C) of the formulas: ##STR1## wherein R.sup.1 is an alkyl group; R.sup.2 and R.sup.3 each is a hydrogen atom or an alkyl group; R.sup.4 is a hydrogen atom, an alkyl group, a phenyl group or a substituted phenyl group; n is equal to 1 through 50; in proportions of a mol %, b mol % and c mol %, respectively, where
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile