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:
Sep. 01, 2026
Filed:
Jun. 01, 2021
Hitachi, Ltd., Tokyo, JP;
Kazuya Shinagawa, Tokyo, JP;
Matahiro Komuro, Tokyo, JP;
Yusuke Asari, Tokyo, JP;
Shohei Terada, Tokyo, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
Soft magnetic materials containing Fe and Co in a total amount of 90 mass % or more are provided herein. The soft magnetic materials contain 50 mass % or more of Fe, 40 mass % or less of Co, 0.1 mass % or less of C, 2.0 mass % or less of Ni, 0.2 mass % or less of Mn, Si, Cr, Ti, Nb, and V, and inevitable impurities; and a precipitate of a compound of iron and nitrogen. The precipitate is created by tension annealing a raw material of the soft magnetic material. Methods of producing the soft magnetic materials are further provided. Electric motors using the soft magnetic materials are further provided.