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:
Feb. 06, 2007
Filed:
Nov. 27, 2002
Akinori Yamamoto, Hatsukaichi, JP;
Yasutaka Ota, Onoda, JP;
Haruki Kurokawa, Hiroshima, JP;
Masaaki Maekawa, Hiroshima, JP;
Akinori Yamamoto, Hatsukaichi, JP;
Yasutaka Ota, Onoda, JP;
Haruki Kurokawa, Hiroshima, JP;
Masaaki Maekawa, Hiroshima, JP;
Toda Kogyo Corporation, Hiroshima-ken, JP;
Abstract
Magnetic metal particles containing iron as a main component, comprising cobalt in an amount of usually 20 to 50 atm %, calculated as Co, based on whole Fe, aluminum in an amount of usually 3 to 15 atm %, calculated as Al, based on whole Fe and a rare earth element in an amount of usually 3 to 20 atm %, calculated as rare earth element, based on whole Fe, and having an average major axis diameter of usually 0.02 to 0.065 μm, preferably from 0.02 to less than 0.05 μm, a coercive force of usually 159.2 to 222.9 kA/m (2,000 to 2,800 Oe), a soluble Na content of usually not more than 30 ppm, a soluble Ca content of usually not more than 100 ppm, and an oxidation stability Δσs of usually not more than 10%.