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. 08, 1988
Filed:
Jun. 23, 1987
Applicant:
Inventors:
Tsuneyoshi Wakui, Chiba, JP;
Takeo Ohnishi, Chiba, JP;
Yuji Shimoyama, Chiba, JP;
Toshio Akizuki, Chiba, JP;
Assignee:
Kawasaki Steel Corporation, Kobe, JP;
Primary Examiner:
Int. Cl.
CPC ...
B21D / ;
U.S. Cl.
CPC ...
428600 ; 428687 ; 428925 ;
Abstract
A steel sheet for DI can having improved DI workability and resistance to die abrasion has such a surface profile that a center-line average surface roughness is within a range of 0.1.about.4.0 .mu.m and a microscopic shape is comprised of mountain portions, groove-like valley portions and middle flat portions satisfying particular dimension relations.