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. 22, 2012
Filed:
Jan. 11, 2008
Hiroyuki Ohgi, Tsukuba, JP;
Tomohiro Ono, Tsukuba, JP;
Shinji Nakai, Tsukuba, JP;
Takeshi Nakano, Tsukuba, JP;
Takeshi Kusudou, Kurashiki, JP;
Naoki Fujiwara, Tokyo, JP;
Hiroyuki Ohgi, Tsukuba, JP;
Tomohiro Ono, Tsukuba, JP;
Shinji Nakai, Tsukuba, JP;
Takeshi Nakano, Tsukuba, JP;
Takeshi Kusudou, Kurashiki, JP;
Naoki Fujiwara, Tokyo, JP;
Kuraray Co., Ltd., Kurashiki-shi, JP;
Abstract
A polymer electrolyte membrane comprising as a main ingredient a block copolymer (P) which comprises, as its constituents, a vinyl alcoholic polymer block (A) and a polymer block (B) having ion-conducting groups, which block copolymer (P) is cross-linking treated, and a membrane-electrode assembly and a fuel cell using the polymer electrolyte membrane, respectively. Preferred as polymer block (B) is one having a styrene or vinylnaphthalene skeleton or a 2-(meth)acrylamido-2-methylpropane skeleton. The ion-conducting group includes a sulfonic acid group, a phosphonic acid group or the like.