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:
Oct. 20, 1992
Filed:
Jul. 08, 1991
Applicant:
Inventors:
Akio Mishima, Hiroshima, JP;
Mamoru Tanihara, Hiroshima, JP;
Yasutaka Ota, Hatsukaichi, JP;
Hirofumi Kawasaki, Aki, JP;
Kenji Okinaka, Hiroshima, JP;
Kunio Ikemoto, Otake, JP;
Kousaku Tamari, Hiroshima, JP;
Kohji Mori, Hiroshima, JP;
Norimichi Nagai, Hiroshima, JP;
Assignee:
Toda Kogyo Corporation, Hiroshima, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B22F / ;
U.S. Cl.
CPC ...
428570 ; 148105 ; 148306 ; 148307 ; 148309 ; 148310 ; 420 77 ; 420 78 ; 420 80 ; 420 95 ; 420 98 ; 420103 ; 420117 ; 420119 ; 420121 ;
Abstract
Disclosed herein are acicular magnetic iron based alloy particles for magnetic recording, containing 1.5 to 10 mol % of B based on Fe (calculated as B) and 1.5 to 10 mol % of Co based on Fe (calculated as Co) in the vicinity of the surfaces of said particles and having a saturation magnetization of not less than 125 emu/g and an S.F.D. value of not more than 0.50, and a process for producing the same.