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:
Apr. 12, 2022
Filed:
Nov. 30, 2017
Tdk Corporation, Tokyo, JP;
Ryuji Hashimoto, Tokyo, JP;
Masashi Ito, Tokyo, JP;
Eiichiro Fukuchi, Tokyo, JP;
Yuki Nagamine, Tokyo, JP;
TDK CORPORATION, Tokyo, JP;
Abstract
To provide a rare earth permanent magnet having as a main phase a compound with a NdFecrystalline structure having strong coercive force. A rare earth permanent magnet having as a main phase a compound with a NdFecrystalline structure, wherein when the composition ratio of the rare earth permanent magnet is expressed as RTC, where R is one or more rare earth elements requiring Sm, and T is one or more transition metal elements requiring Fe or Fe and Co, a and b satisfy 18<a<40 and 0.5≤b, and a phase where R and C are denser than the main phase is provided in the grain boundary phase of the rare earth permanent magnet.