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:
May. 31, 1988
Filed:
Oct. 01, 1986
Applicant:
Inventor:
Kenji Itozawa, Hino, JP;
Assignee:
Konishiroku Photo Industry Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
428328 ; 252 6254 ; 427128 ; 428694 ; 428900 ; 428329 ; 428698 ;
Abstract
A magnetic recording medium containing iron carbide is disclosed. Iron carbide shows electric conductivity and low light transmission. Therefor an antistatic property and light shielding ability of the medium are improved. Iron carbide is contained in the magnetic layer of the medium in combined with the other ferromagnetic materials such as Co-adhered-.gamma.-Fe.sub.2 O.sub.3 or hexagonal ferrite. An amount of iron carbide in the magnetic layer is within the range of from 1.5 to 15% of the magnetic layer by volume.