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:
Nov. 06, 2012
Filed:
Jan. 29, 2010
Hiroyuki Suzuki, Hitachi, JP;
Takao Imagawa, Mito, JP;
Yuichi Satsu, Hitachi, JP;
Matahiro Komuro, Hitachi, JP;
Hiroyuki Suzuki, Hitachi, JP;
Takao Imagawa, Mito, JP;
Yuichi Satsu, Hitachi, JP;
Matahiro Komuro, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A rare earth magnet having a composition represented by RTB wherein R denotes a rare earth element, T a transition metal and B boron, the magnet being composed of magnet powder constituted by crystalline particles. The particles of the magnetic powder have a ratio of a short diameter being 10 μm or more to a long diameter is 0.5 or less. An element Rm having a magnetic anisotropy higher than that of the rare earth element is contained in the surface and inside of the magnet constituted by the magnet powder in an approximately constant concentration. An oxy-fluoride and carbon are present at boundaries of the particles of the magnet powder.