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:
May. 27, 2014
Filed:
Jun. 03, 2011
Keiji Iwata, Tokyo, JP;
Yasuhiro Kikuchi, Tokyo, JP;
Keiji Iwata, Tokyo, JP;
Yasuhiro Kikuchi, Tokyo, JP;
Nippon Steel & Sumitomo Metal Corporation, Tokyo, JP;
Abstract
A resist film is formed on a cold-rolled steel sheet so as to fabricate a groove by etching. At this point, a steel sheet exposed portion where a portion of the steel sheet is exposed is formed in the resist film, and the steel sheet exposed portion has a first region oriented in a sheet width direction, and a plurality of second regions starting from the first region, widths of the first region and the second regions being 20 μm to 100 μm, and a distance from an end portion of one of the second regions to an end portion of another of the second regions adjacent thereto being 60 μm to 570 μm.