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. 27, 2009
Filed:
Sep. 07, 2001
Tsutomu Miyano, Sakai, JP;
Takeshi Shimizu, Sakai, JP;
Keiji Izumi, Sakai, JP;
Yoshikazu Morita, Sakai, JP;
Shinichi Kamoshida, Sakai, JP;
Toshiki Kingetsu, Sakai, JP;
Tsutomu Miyano, Sakai, JP;
Takeshi Shimizu, Sakai, JP;
Keiji Izumi, Sakai, JP;
Yoshikazu Morita, Sakai, JP;
Shinichi Kamoshida, Sakai, JP;
Toshiki Kingetsu, Sakai, JP;
Nisshin Steel Co., Ltd., Tokyo, JP;
Abstract
A stainless steel sheet useful as a separator for a low-temperature fuel cell has the surface state that a lot of fine projections (p) stand close together around many fine pits (d) formed over a whole surface. The surface state is realized by alternating electrolytic etching in a ferric chloride solution. When the stainless steel separator is built in a fuel cell, contact resistance between the separator and a graphite electrode is kept at a lower level even in a corrosive atmosphere. Consequently, the fuel cell can be driven with high power-generating efficiency over a long term even under severely corrosive conditions without generation of massive Joule heat.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile