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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.:

US 12781373 B1

PDFFull Text
Date of Patent:
Nov. 03, 2026

Filed:

Feb. 20, 2023

Surface-treated steel sheet and method of producing same

Applicant:

Jfe Steel Corporation, Tokyo, JP;

Inventors:

Takashi Ueno, Tokyo, JP;

Yusuke Nakagawa, Tokyo, JP;

Assignee:

JFE STEEL CORPORATION, Tokyo, JP;

Attorney:

KENJA IP LAW PC

Primary Examiner:

Michael E La Villa

Int. Cl.
CPC ...
C25D 3/06 (2006.01); B32B 15/01 (2006.01); B32B 15/04 (2006.01); B32B 15/18 (2006.01); C23C 28/00 (2006.01); C23C 28/02 (2006.01); C23C 30/00 (2006.01); C25D 3/12 (2006.01); C25D 3/14 (2006.01); C25D 5/12 (2006.01); C25D 5/14 (2006.01); C25D 5/36 (2006.01); C25D 5/48 (2006.01); C25D 5/50 (2006.01); C25D 7/06 (2006.01);
U.S. Cl.
CPC ...
C25D 3/06 (2013.01); B32B 15/01 (2013.01); B32B 15/013 (2013.01); B32B 15/015 (2013.01); B32B 15/04 (2013.01); B32B 15/043 (2013.01); B32B 15/18 (2013.01); C23C 28/02 (2013.01); C23C 28/023 (2013.01); C23C 28/30 (2013.01); C23C 28/32 (2013.01); C23C 28/322 (2013.01); C23C 30/00 (2013.01); C23C 30/005 (2013.01); C25D 3/12 (2013.01); C25D 3/14 (2013.01); C25D 5/12 (2013.01); C25D 5/14 (2013.01); C25D 5/36 (2013.01); C25D 5/48 (2013.01); C25D 5/505 (2013.01); C25D 7/0614 (2013.01); Y10T 428/1259 (2015.01); Y10T 428/1266 (2015.01); Y10T 428/12667 (2015.01); Y10T 428/12708 (2015.01); Y10T 428/12722 (2015.01); Y10T 428/12847 (2015.01); Y10T 428/12854 (2015.01); Y10T 428/12937 (2015.01); Y10T 428/12944 (2015.01); Y10T 428/12972 (2015.01); Y10T 428/12993 (2015.01); Y10T 428/24942 (2015.01); Y10T 428/2495 (2015.01); Y10T 428/24959 (2015.01); Y10T 428/24967 (2015.01); Y10T 428/26 (2015.01); Y10T 428/263 (2015.01); Y10T 428/264 (2015.01); Y10T 428/265 (2015.01); Y10T 428/27 (2015.01);
Abstract

Provided is a surface-treated steel sheet that can be produced without using hexavalent chromium and is excellent in adhesion to BPA-free paint and BPA-free painting corrosion resistance. A surface-treated steel sheet comprises: a steel sheet; a metallic Cr layer disposed on a surface of the steel sheet on at least one side; and a Cr oxide layer disposed on the metallic Cr layer, wherein a contact angle of ethylene glycol is 50° or less, and a total atomic ratio of K, Na, Mg, and Ca adsorbed on a surface of the surface-treated steel sheet on the at least one side to Cr is 5.0% or less.

Find Patent Forward Citations

Quick Actions:

Ueno, Takashi. (2026). Surface-treated steel sheet and method of producing same (U.S. Patent No. 12781373). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12781373

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