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:
Dec. 13, 2011
Filed:
Aug. 09, 2007
Kouki Kinouchi, Yokohama, JP;
Wataru Kurokawa, Yokohama, JP;
Shouzou Shintani, Yokohama, JP;
Kinuyo Shintani, Legal Representative, Higashiosaka, JP;
Daisuke Imoda, Yokohama, JP;
Kenji Yoshihiro, Yokohama, JP;
You Yamamori, Yokohama, JP;
Kouki Kinouchi, Yokohama, JP;
Wataru Kurokawa, Yokohama, JP;
Shouzou Shintani, Yokohama, JP;
Kinuyo Shintani, legal representative, Higashiosaka, JP;
Daisuke Imoda, Yokohama, JP;
Kenji Yoshihiro, Yokohama, JP;
You Yamamori, Yokohama, JP;
Toyo Seikan Kaisha, Ltd., Tokyo, JP;
Abstract
A stainless steel material for a fuel cell, used for a fuel cell or a cartridge for the fuel cell, having a magnetic permeability of 1.000 to 2.500, and forming a layer having a value of chromium atomic %/iron atomic % of not less than 3.0 in the most surface thereof, and/or the layer of thickness of not less than 12 nm calculated as SiOhaving an oxygen atomic % of not less than 20%. Even when brought into contact with the content solution exhibiting acidity of the fuel cell, the stainless steel material reliably suppresses the elution of metal ions thereof.