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:
Mar. 20, 1990
Filed:
Sep. 10, 1987
Applicant:
Inventors:
Yukio Inokuti, Chiba, JP;
Yoh Ito, Chiba, JP;
Assignee:
Kawasaki Steel Corp., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01F / ;
U.S. Cl.
CPC ...
148113 ; 148111 ; 148120 ; 148122 ; 21912119 ; 21912135 ;
Abstract
An extra-low iron loss grain oriented silicon steel sheet is produced by irradiating electron beam to an insulation coating formed on a grain oriented silicon steel sheet after finish annealing in a direction crossing the rolling direction of the sheet, whereby the magnetic properties are not degraded even if the steel sheet is subjected to a strain relief annealing. If necessary, an inert gas may be introduced into the vicinity of electron beam irradiated zone of the coating.