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:
Sep. 20, 1988
Filed:
Jan. 23, 1987
Applicant:
Inventors:
Yuichi Kubota, Nagano, JP;
Masaharu Nishimatsu, Nagano, JP;
Kazunori Tamazaki, Nagano, JP;
Keiji Koga, Nagano, JP;
Toru Shimozawa, Nagano, JP;
Assignee:
TDK Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
428328 ; 252 6254 ; 427 44 ; 427128 ; 428329 ; 428408 ; 428694 ; 428695 ; 428900 ;
Abstract
A magnetic recording medium comprising a substrate, an optional undercoat layer, and a magnetic layer formed thereon and containing a hexagonal plate magnetic powder, an electroconductive material, and a binder is improved in runnability and recording density by the presence of a fatty acid ester at least on the recording side surface of the magnetic layer, and by providing an electric resistance of up to 5.times.10.sup.9 .OMEGA./cm.sup.2 on the side of the magnetic layer.