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:
Nov. 06, 2012
Filed:
Dec. 26, 2007
Kousuke Sasai, Ohtsu, JP;
Hiroki Yamaguchi, Ohtsu, JP;
Yoshimitsu Sakaguchi, Ohtsu, JP;
Kouta Kitamura, Ohtsu, JP;
Masahiro Yamashita, Ohtsu, JP;
Kousuke Sasai, Ohtsu, JP;
Hiroki Yamaguchi, Ohtsu, JP;
Yoshimitsu Sakaguchi, Ohtsu, JP;
Kouta Kitamura, Ohtsu, JP;
Masahiro Yamashita, Ohtsu, JP;
Toyo Boseki Kabushiki Kaisha, Osaka-shi, JP;
Abstract
The invention provides a method for producing a polymer electrolyte membrane including (A) a membrane formation step of forming a membrane-form product of an ionic group-containing polymer electrolyte on a support, (B) an acid treatment step of exchanging the ionic group into an acid type by bringing the membrane into contact with an inorganic acid-containing acidic liquid, (C) an acid removal step of removing a free acid in the acid-treated membrane, and (D) a drying step of drying the acid-removed membrane, wherein the steps (B) to (D) are carried out without separating the membrane from the support.