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:
May. 06, 1980
Filed:
Jul. 21, 1978
Applicant:
Inventors:
Masao Gotoda, Takasaki, JP;
Toshio Okada, Kadoma, JP;
Kazuo Murata, Takatsuki, JP;
Kusuhiko Takahashi, Tokyo, JP;
Assignees:
Japan Atomic Energy Research Institute, Tokyo, JP;
Toshiba Ray-O-Vak K.K., Tokyo, JP;
Yuasa Battery Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F / ;
U.S. Cl.
CPC ...
20415917 ; 429254 ; 525244 ; 525301 ;
Abstract
A process is, herein, disclosed for preparing a membrane used for prevention of short-circuiting between the anode and the cathode of a battery comprising contacting a polyethylene film with an aqueous solution of acrylic acid, water, ethylene dichloride and ferrous salt or cupric salt and irradiating with ionizing radiation to obtain a polyethylene film with acrylic acid molecules grafted uniformly thereon.