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:
Sep. 01, 1981
Filed:
Apr. 21, 1980
Applicant:
Inventors:
Sueo Machi, Takasaki, JP;
Isao Ishigaki, Maebashi, JP;
Takanobu Sugo, Gunma, JP;
Toshio Okada, Kadoma, JP;
Kazuo Murata, Takatsuki, JP;
Shiro Tanso, Takatuski, JP;
Keizi Senoo, Takatsuki, JP;
Assignees:
Japan Atomic Energy Research Inst., Tokyo, JP;
Yuasa Battery Co. Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01M / ;
U.S. Cl.
CPC ...
429144 ; 429254 ;
Abstract
There is disclosed a novel cell separator made of a grafted membrane comprising a polyethylene film which is graft-copolymerized with a monomer having an ion exchange group, characterized in that said membrane has an area which is not grafted at all or an area of low degree grafting. By making use of this membrane, a small size and thin cell having excellent performance as well as satisfactory mechanical strength can be produced at low cost with great advantages.