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:
Jul. 25, 1989
Filed:
Mar. 07, 1988
Applicant:
Inventors:
Hidehiko Sumitomo, Yamaguchi, JP;
Takanori Nakazawa, Kanagawa, JP;
Jun Nakatsuka, Yamaguchi, JP;
Jiro Tominaga, Yamaguchi, JP;
Yoshiaki Kanai, Tokyo, JP;
Assignees:
Nippon Steel Corp., Tokyo, JP;
TNK Sanwa Precision Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C22C / ;
U.S. Cl.
CPC ...
148327 ; 420 56 ; 420 59 ;
Abstract
A non-magnetic cold-deformed stainless steel usable for electronic equipment parts has a Vickers hardness number after cold forming of not less than 400 and a magnetic permeability of not more than 1.01. The steel has excellent hot workability and is mainly used for components such as shafts and pins of VTRs and VTR cassette tapes.