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. 14, 2007
Filed:
Dec. 12, 2002
Osamu Ishigami, Sayama, JP;
Tetsuya Kondo, Sayama, JP;
Osamu Ishigami, Sayama, JP;
Tetsuya Kondo, Sayama, JP;
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A fuel cell separator manufacturing method including the steps of removing an abnormal layer () arising at the surface layer of a metal material for use as a separator () when it is rolled, exposing portions of conductors () included in a surface layer part of the metal material itself to project, and carrying out a passivation treatment on the surface layer part of the metal material itself. The steps of removing the abnormal layer and exposing portions of the conductors are possible in the same process, chemically or electro-chemically. Therefore, the number of steps can be cut and increased productivity and reduced cost of separators can be achieved.