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. 10, 1981
Filed:
Jul. 12, 1979
Shigeto Miyoshi, Shibukawa, JP;
Toshio Kagami, Takasaki, JP;
Denki Kagaku Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
In the manufacture of a vinyl chloride copolymer solution by dissolving in an organic solvent a vinyl chloride copolymer consisting of 50 to 90 wt % of vinyl chloride and 10 to 50 wt % of vinyl ester and having a mean polymerization degree of 100 to 800 and hydrolyzing the solution in the presence of alcohol, the viscosity of the hydrolyzed solution of the vinyl chloride copolymer is adjusted to 500 to 1000 CPS and the alcohol and the organic solvent are distilled at a temperature below 60.degree. C. under a reduced pressure of 100 to 200 Torr and, when the alcohol content in the hydrolyzed solution becomes less than 0.5 wt %, the atmospheric pressure is restored.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile