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:
Dec. 15, 1981
Filed:
Nov. 09, 1979
Applicant:
Inventors:
Takashi Matsukura, Funahashi, JP;
Norio Tsukiji, Hiroshima, JP;
Yoshiaki Ishimoto, Kure, JP;
Masahiro Shimose, Amagasaki, JP;
Yasuo Imamura, Urawa, JP;
Assignees:
Nisshin Steel Co., Ltd., Tokyo, JP;
Dai Nippon Printing, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
313402 ; 2916 / ; 29557 ; 29 2518 ; 156644 ; 252502 ;
Abstract
A shadow mask of a Braun tube for a color TV made of a steel alloy having the following compositions in weight percent: C.ltoreq.0.12, 0.2.ltoreq.Mn.ltoreq.1.5, 0.3.ltoreq.Si.ltoreq.1.5, 1.0.ltoreq.2Si+Mn, 0.005.ltoreq.Al.ltoreq.0.030, and the balance being Fe and unavoidable impurities. A cold rolled and annealed strip made from such a steel alloy has a Vickers hardness of at least 110 so that it can be easily and satisfactorily processed in the subsequent hole-formation step.