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:
Aug. 05, 2008
Filed:
Feb. 02, 2005
Hiroki Kusakabe, Sakai, JP;
Kazuhito Hatoh, Osaka, JP;
Toshihiro Matsumoto, Takatsuki, JP;
Norihiko Kawabata, Hirakata, JP;
Yoshiki Nagao, Ibaraki, JP;
Shinsuke Takeguchi, Takatsuki, JP;
Hiroki Kusakabe, Sakai, JP;
Kazuhito Hatoh, Osaka, JP;
Toshihiro Matsumoto, Takatsuki, JP;
Norihiko Kawabata, Hirakata, JP;
Yoshiki Nagao, Ibaraki, JP;
Shinsuke Takeguchi, Takatsuki, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
In a polymer electrolyte fuel cell, at least one of the anode side separator plate and cathode side separator plate is formed with a main surface having a convex shape protruding toward a gas diffusion layer, and a peripheral edge portion surrounding the main surface. An average thickness of the main surface is made to be thicker than an average thickness of the peripheral edge portion. And a difference Δt between the thickest part of the main surface and an average thickness of the peripheral edge portion is made to be 5-30 μm.