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. 29, 1987
Filed:
Feb. 27, 1986
Applicant:
Inventors:
Masaya Funahashi, Osaka, JP;
Teruhisa Miyata, Kyoto, JP;
Kenichi Inoue, Muko, JP;
Akira Miyake, Kyoto, JP;
Assignee:
Hitachi Maxell, Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
428695 ; 252 6254 ; 427128 ; 427131 ; 428328 ; 428329 ; 428694 ; 428900 ;
Abstract
A magnetic recording medium improved in durability at an elevated temperature which comprises a substrate and a magnetic layer comprising magnetic powder and a resinous binder formed on the substrate, characterized in that the magnetic layer further comprises an ester of a polyvalent alcohol with a fatty acid in an amount of 0.01 to 40 parts by weight to one part by weight of the magnetic powder.