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:
Mar. 09, 2021
Filed:
Dec. 01, 2014
Asahi Kasei Kabushiki Kaisha, Tokyo, JP;
Daikin Industries, Ltd., Osaka, JP;
Yuichi Inoue, Tokyo, JP;
Kuon Miyazaki, Tokyo, JP;
Kentaro Kikuchi, Tokyo, JP;
Nobuki Uraoka, Settsu, JP;
Shinichi Chaen, Settsu, JP;
Tomohisa Konishi, Settsu, JP;
Tadashi Ino, Settsu, JP;
ASAHI KASEI KABUSHIKI KAISHA, Tokyo, JP;
DAIKIN INDUSTRIES, LTD., Osaka, JP;
Abstract
The present invention provides a polymer electrolyte membrane having excellent strength, a small dimensional change, and a low membrane resistance. The polymer electrolyte membrane includes a porous film having pores and a polymer electrolyte contained in the pores. The porous film is obtained by copolymerizing tetrafluoroethylene and an ethylenic comonomer to provide polytetrafluoroethylene and then stretching the polytetrafluoroethylene. The porous film has an average pore size of greater than 0.20 μm.