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:
Dec. 16, 1997
Filed:
Jul. 01, 1996
Applicant:
Inventors:
Kouichi Masaki, Kanagawa, JP;
Toshihiko Miura, Kanagawa, JP;
Assignee:
Fuji Photo Film Co., Ltd., Kanagawa-ken, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
428328 ; 428332 ; 4286 / ; 4286 / ; 428900 ;
Abstract
A magnetic recording medium comprising a nonmagnetic support having provided thereon at least a magnetic layer containing ferromagnetic metal particles, wherein the magnetic layer has a coercive force of 2,000 to 3,000 Oe and a Bm of 3,800 to 5,500 G, the ferromagnetic metal particles has an average major axis length of 0.05 to 0.12 .mu.m and an average aspect ratio of 4.0 to 10.0, the average number of crystallites constituting the ferromagnetic metal particles per particle is from 2.0 to 5.0, and the crystallites has an average aspect ratio of 1.0 to 2.0.