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:
Oct. 11, 1983
Filed:
Oct. 07, 1980
Seiji Takao, Okayama, JP;
Japan Exlan Company Limited, , JP;
Abstract
A process for producing hollow acrylonitrilic separation membranes in fibrous form which comprises shaping a membranous product in hollow fibrous form from a solution of acrylonitrile polymer dissolved in formamide-containing dimethylformamide while maintaining the temperature of said polymer solution within a specified range and subjecting said membranous product to a solvent removal treatment under a specific condition, thereby producing an acrylonitrilic separation membrane which is asymmetric, porous in structure, and excellent both in separation ability and in mechanical strength.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile