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:
Feb. 23, 2021
Filed:
May. 22, 2017
Applicant:
Jfe Steel Corporation, Chiyoda-ku Tokyo, JP;
Inventors:
Takayoshi Yano, Tokyo, JP;
Shin Ishikawa, Tokyo, JP;
Assignee:
JFE STEEL CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01M 8/0228 (2016.01); H01M 8/021 (2016.01); C21D 9/46 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/48 (2006.01); H01M 8/0217 (2016.01); C23G 1/08 (2006.01); C21D 6/00 (2006.01); C22C 38/50 (2006.01); C25F 3/06 (2006.01); C22C 38/00 (2006.01); C21D 8/02 (2006.01); C21D 1/26 (2006.01); C21D 1/76 (2006.01); C22C 38/60 (2006.01); C21D 1/74 (2006.01); H01M 8/1025 (2016.01); H01M 8/1018 (2016.01); C22C 38/42 (2006.01); C22C 38/46 (2006.01); C22C 38/52 (2006.01); C22C 38/44 (2006.01); H01M 8/0254 (2016.01);
U.S. Cl.
CPC ...
H01M 8/0228 (2013.01); C21D 1/26 (2013.01); C21D 1/74 (2013.01); C21D 1/76 (2013.01); C21D 6/004 (2013.01); C21D 6/008 (2013.01); C21D 8/0247 (2013.01); C21D 9/46 (2013.01); C22C 38/00 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/48 (2013.01); C22C 38/50 (2013.01); C22C 38/60 (2013.01); C23G 1/08 (2013.01); C25F 3/06 (2013.01); H01M 8/021 (2013.01); H01M 8/0219 (2013.01); C21D 6/007 (2013.01); C21D 2211/005 (2013.01); C22C 38/42 (2013.01); C22C 38/44 (2013.01); C22C 38/46 (2013.01); C22C 38/52 (2013.01); C23G 1/081 (2013.01); C23G 1/083 (2013.01); C23G 1/085 (2013.01); H01M 8/0254 (2013.01); H01M 8/1025 (2013.01); H01M 2008/1095 (2013.01); Y02P 70/50 (2015.11);
Abstract
A stainless steel sheet for fuel cell separators comprises: a predetermined chemical composition; and Cr-containing fine precipitates at a steel sheet surface, wherein an average equivalent circular diameter of the fine precipitates is 20 nm or more and 500 nm or less, and a number of the fine precipitates existing per 1 μmat the steel sheet surface is three or more.