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. 17, 2010
Filed:
Feb. 26, 2007
Yoshio Tarutani, Hyogo, JP;
Akira Seki, Ashiya, JP;
Takashi Maeda, Ashiya, JP;
Wataru Takahashi, Nishinomiya, JP;
Takashi Doi, Rittou, JP;
Yoshio Tarutani, Hyogo, JP;
Akira Seki, Ashiya, JP;
Takashi Maeda, Ashiya, JP;
Wataru Takahashi, Nishinomiya, JP;
Takashi Doi, Rittou, JP;
Sumitomo Metal Industries, Ltd., Osaka, JP;
Abstract
A separator material effective for decreasing the weight of fuel cells is provided which is lightweight, has good corrosion resistance, and exhibits a minimized increase in electrical contact resistance during use for a long period. Titanium or a titanium alloy is prepared by melting so as to contain not greater than 5 mass % B, thereby forming a titanium-based material in which fine TiB-type boride particles are precipitated and dispersed. The material is then etched in an aqueous acidic solution such that some of the TiB-type boride particles are exposed on the surface through the passive film formed thereon.