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:
Jun. 02, 2009
Filed:
Aug. 19, 2004
Tohru Koyama, Hitachi, JP;
Toshiyuki Kobayashi, Tokai, JP;
Kenji Yamaga, Hitachi, JP;
Tomoichi Kamo, Tokai, JP;
Kazutoshi Higashiyama, Naka, JP;
Tohru Koyama, Hitachi, JP;
Toshiyuki Kobayashi, Tokai, JP;
Kenji Yamaga, Hitachi, JP;
Tomoichi Kamo, Tokai, JP;
Kazutoshi Higashiyama, Naka, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
An object of the present invention is to provide a highly durable solid polymer electrolyte that has a deterioration resistance equal to or higher than that of the fluorine-containing solid polymer electrolytes or a deterioration resistance sufficient for practical purposes, and can be produced at a low cost. According to the present invention, there is provided a solid polymer electrolyte comprising a polyether ether sulfone that is used as an electrolyte and has sulfoalkyl groups bonded to its aromatic rings and represented by the general formula —(CH)—SOH.