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:
Oct. 08, 1996
Filed:
Jan. 06, 1994
Applicant:
Inventors:
Tadashi Inoue, Kawasaki, JP;
Kiyoshi Tsuru, Kawasaki, JP;
Michihito Hiasa, Kawasaki, JP;
Tomoyoshi Okita, Kawasaki, JP;
Assignee:
NKK Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C22C / ; C22C / ;
U.S. Cl.
CPC ...
148310 ; 148336 ; 420 94 ;
Abstract
An alloy sheet for making a shadow mask consists essentially of 34 to 38 wt. % Ni, 0.07 wt. % or less Si, 0.001 wt. % or less B, 0.003 wt. % or less O, 0.002 wt. % or less N, and the balance being Fe and inevitable impurities. The alloy sheet has an average austenite grain size (Dav) of 10.5 to 15.0 .mu.m, a ratio of a maximum size to the minimum size of austenite grains (Dmax/Dmin) of 1 to 15, a Vickers hardness (Hv) of 165 to 220 and satisfying a relation of