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. 10, 2025
Filed:
Dec. 21, 2021
Applicants:
Posco Co., Ltd, Pohang-si, KR;
Research Institute of Industrial Science & Technology, Pohang-si, KR;
Inventors:
Assignee:
POSCO CO., LTD., Pohang-si, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C22C 18/04 (2006.01); C21D 1/74 (2006.01);
U.S. Cl.
CPC ...
C21D 1/74 (2013.01); C22C 18/04 (2013.01);
Abstract
A black plated steel sheet may include a steel sheet and a zinc plating layer positioned on one side of the steel sheet. The zinc plating layer may contain a black layer on the uppermost surface. The black layer may include three or more portions of which the blackness is different from each other. In a first part, the thickness of the black layer may be more than 1 μm. In a second part, the thickness of the black layer may be 250 nm or more to less than 1 μm, and in a third part, the thickness of the black layer may be less than 200 nm.