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:
May. 28, 2019
Filed:
Jan. 22, 2015
Nippon Steel & Sumitomo Metal Corporation, Tokyo, JP;
Kazuhiro Takahashi, Tokyo, JP;
Taku Kagawa, Tokyo, JP;
Masanari Kimoto, Tokyo, JP;
Junko Imamura, Tokyo, JP;
Kiyonori Tokuno, Tokyo, JP;
Atsuhiko Kuroda, Tokyo, JP;
NIPPON STEEL & SUMITOMO METAL CORPORATION, Tokyo, JP;
Abstract
In a titanium material or a titanium alloy material, in an oxide film formed on a surface of a titanium or a titanium alloy, the composition ratio of TiO (I/(I+I)×100 found from the maximum intensity of the X-ray diffraction peaks of TiO (I) and the maximum intensity of the X-ray diffraction peaks of metal titanium (I) in X-ray diffraction measured at an incident angle to the surface of 0.3° is 0.5% or more. A titanium material or a titanium alloy material, and a fuel cell separator and a polymer electrolyte fuel cell having good contact-to-carbon electrical conductivity and good durability can be provided.