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:
Mar. 03, 1987
Filed:
Sep. 16, 1985
Applicant:
Inventors:
Akira Miyake, Kyoto, JP;
Masaya Funahashi, Osaka, JP;
Assignee:
Hitachi Maxell, Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
428323 ; 252 6254 ; 427128 ; 427131 ; 428328 ; 428329 ; 428694 ; 428695 ; 428900 ;
Abstract
A magnetic recording medium which comprises a substrate and a magnetic layer comprising a magnetic powder, a resinous binder, a lubricant and optionally a non-magnetic abrasive being formed on at least one surface of the substrate, characterized in that the lubricant comprises an ester of an unsaturated higher fatty acid with an alcohol having 6 to 16 carbon atoms, which has improved wear resistance in a wide temperature range.