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:
Oct. 02, 2007
Filed:
Aug. 06, 2004
Masaru Yoshida, Gunma-ken, JP;
Tetsuya Yamaki, Gunma-ken, JP;
Masaharu Asano, Gunma-ken, JP;
Yosuke Morita, Gunma-ken, JP;
Masaru Yoshida, Gunma-ken, JP;
Tetsuya Yamaki, Gunma-ken, JP;
Masaharu Asano, Gunma-ken, JP;
Yosuke Morita, Gunma-ken, JP;
Japan Atomic Energy Research Institute, Kashiwa-Shi, JP;
Abstract
A polymer film substrate is irradiated with ions to make a large number of nano-sized through-holes and the substrate is further irradiated with an ionizing radiation so that a functional monomer is grafted or co-grafted onto a surface of the film and within the holes; in addition, the sulfonic acid group is introduced into the graft chains, thereby producing a polymer ion-exchange membrane that has high oxidation resistance, dimensional stability, electrical conductivity and methanol resistance, as well as an ion-exchange capacity controlled over a wide range.