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. 26, 2009
Filed:
Feb. 03, 2003
Shiro Hamamoto, Otsu, JP;
Satoshi Takase, Otsu, JP;
Yoshimitsu Sakaguchi, Otsu, JP;
Shigenori Nagahara, Otsu, JP;
Kota Kitamura, Otsu, JP;
Junko Nakao, Otsu, JP;
Kousuke Sasai, Otsu, JP;
Shiro Hamamoto, Otsu, JP;
Satoshi Takase, Otsu, JP;
Yoshimitsu Sakaguchi, Otsu, JP;
Shigenori Nagahara, Otsu, JP;
Kota Kitamura, Otsu, JP;
Junko Nakao, Otsu, JP;
Kousuke Sasai, Otsu, JP;
Toyo Boseki Kabushiki Kaisha, Osaka-shi, JP;
Abstract
The present invention provides a composite ion exchange membrane which has high mechanical strength and is suitable for use as a solid polymer electrolyte membrane excellent in ionic conductivity and a method for its production. The invention is achieved by a composite ion exchange membrane including a composite layer comprising a support membrane with continuous voids formed of polybenzazole polymer, the support membrane being impregnated with ion exchange resin, and surface layers formed of ion exchange resin free of support membranes, the surface layers being formed on both surfaces of the composite layer so as to sandwich the composite layer therebetween.