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:
Oct. 05, 2010
Filed:
Jun. 22, 2006
Hiroshi Kihira, Futtsu, JP;
Michio Kaneko, Futtsu, JP;
Mitsuharu Yamagata, Futtsu, JP;
Koki Tanaka, Futtsu, JP;
Yoichi Ikematsu, Futtsu, JP;
Yoichi Matsuzaki, Fattsu, JP;
Kazuto Kawakami, Futtsu, JP;
Wataru Hisada, Kitanagoya, JP;
Suguru Suzuki, Kitanagoya, JP;
Hiroshi Kihira, Futtsu, JP;
Michio Kaneko, Futtsu, JP;
Mitsuharu Yamagata, Futtsu, JP;
Koki Tanaka, Futtsu, JP;
Yoichi Ikematsu, Futtsu, JP;
Yoichi Matsuzaki, Fattsu, JP;
Kazuto Kawakami, Futtsu, JP;
Wataru Hisada, Kitanagoya, JP;
Suguru Suzuki, Kitanagoya, JP;
Nippon Steel Corporation, Tokyo, JP;
Sintokogio Ltd., Nagoya, JP;
Abstract
The present invention releases a method of producing a metal separator for a solid polymer fuel cell by stainless steel, titanium, or titanium alloy during which securing lower cost and mass producibility by using a material having a high workability to form a complicated shape by a high productivity, then using an inexpensive blast process to drive a conductive substance into the surface of the metal separator member, that is, provides a stainless steel, titanium, or titanium alloy solid polymer fuel cell separator comprised of stainless steel, titanium, or titanium alloy in the surface of which a low ion release conductive substance is buried, having an arithmetic mean roughness (Ra) of the separator surface of 0.5 to 5.0 μm, having a 10-point mean roughness (Rz) of 3 to 20 μm, having an average spacing of surface relief shapes (Sm) of 300 μm or less, having values of a warp rate and twist rate of a separator of 0.1 or less, and having a contact resistance value with respect to carbon paper of 15 mΩcmor less at a surface pressure of 1 MPa.