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. 31, 2019
Filed:
Dec. 22, 2015
Nippon Steel & Sumitomo Metal Corporation, Tokyo, JP;
Shuichi Yamazaki, Tokyo, JP;
Masaru Takahashi, Tokyo, JP;
Kazutoshi Takeda, Tokyo, JP;
Hiroyasu Fujii, Tokyo, JP;
Koji Kanehashi, Tokyo, JP;
NIPPON STEEL CORPORATION, Tokyo, JP;
Abstract
An electrical steel sheet () includes a base material () of electrical steel, and an insulating film () formed on a surface of the base material (). The insulating film () contains a phosphates of one or more selected from the group consisting of Al, Zn, Mg and Ca. The phosphate exhibits a specific peak having a top within a range of −26 ppm to −16 ppm in a solidP-NMR spectrum, and a proportion of an integrated intensity of the specific peak relative to an integrated intensity of all peaks in the solidP-NMR spectrum is 30% or more.