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:
Nov. 30, 2010
Filed:
Jul. 28, 2004
Takafumi Yamaji, Okayama, JP;
Reiko Yamaji, Legal Representative, Okayama, JP;
Akira Matsuzaki, Hiroshima, JP;
Kazuhisa Okai, Hiroshima, JP;
Keiji Yoshida, Tokyo, JP;
Masaaki Yamashita, Okayama, JP;
Yuichi Fukushima, Tokyo, JP;
Toshiyuki Okuma, Tokyo, JP;
Takafumi Yamaji, Okayama, JP;
Reiko Yamaji, legal representative, Okayama, JP;
Akira Matsuzaki, Hiroshima, JP;
Kazuhisa Okai, Hiroshima, JP;
Keiji Yoshida, Tokyo, JP;
Masaaki Yamashita, Okayama, JP;
Yuichi Fukushima, Tokyo, JP;
Toshiyuki Okuma, Tokyo, JP;
JFE Steel Corporation, , JP;
Abstract
The present invention provides a surface treated steel sheet including a steel sheet; a plating layer containing at least one metal selected from the group consisting of zinc and aluminum on a surface of the steel sheet; and a film on the plating layer, the film containing at least one metal selected from the group consisting of Al, Mg, and Zn, a tetravalent vanadium compound, and a phosphoric acid group. This surface treated steel sheet exhibits excellent corrosion resistance and excellent surface appearance without containing hazardous substances, such as hexavalent chromium, in the film.