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:
Aug. 09, 2005
Filed:
Jan. 18, 2002
Yoichi Asano, Saitama-ken, JP;
Masaaki Nanaumi, Saitama-ken, JP;
Hiroshi Sohma, Saitama-ken, JP;
Nagayuki Kanaoka, Saitama-ken, JP;
Nobuhiro Saito, Saitama-ken, JP;
Yoichi Asano, Saitama-ken, JP;
Masaaki Nanaumi, Saitama-ken, JP;
Hiroshi Sohma, Saitama-ken, JP;
Nagayuki Kanaoka, Saitama-ken, JP;
Nobuhiro Saito, Saitama-ken, JP;
Honda Giken Kabushiki Kaisha, Tokyo, JP;
Abstract
A polymer electrolyte membrane obtained by subjecting a sulfonated polyarylene membrane having an initial water content of 80-300 weight % to a hot-water treatment. A composite polymer electrolyte membrane comprising a matrix made of a first sulfonated aromatic polymer having a high ion exchange capacity, and a reinforcing material constituted by a second sulfonated aromatic polymer having a low ion exchange capacity in the form of fibers or a porous membrane.