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:
Jun. 25, 2002
Filed:
May. 05, 1999
Masanori Matsukawa, Aichi, JP;
Aisin Takaoka Co., Ltd., Toyota, JP;
Abstract
For use in a fuel cell, constituted by plural cells, a separator that can reduce fluctuations in electromotive force across respective cells. An electrically conductive member , as a separator, and a processing electrode , having patterned electrode projections , are immersed in an electrolytic solution facing each other. Current is fed between member and electrode for electrolytic processing to dissolve the portion of the member facing projections , thus forming a gas path having a surface roughness Rz on this bottom surface not larger than 1 &mgr;m. Using the separator having the gas path with extremely smooth bottom surface, the gas flow in each cell proceeds in a reduced fluctuation to reduce fluctuations in the electromotive force.