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. 27, 1988
Filed:
May. 28, 1986
Applicant:
Inventors:
Kumiko Ojima, Mito, JP;
Yukio Matsumoto, Mito, JP;
Hiroshi Togashi, Yamagata, JP;
Hiroshi Ogino, Mito, JP;
Assignee:
Victor Company of Japan, Ltd., Yokohama, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
428323 ; 427128 ; 427131 ; 428408 ; 428328 ; 428329 ; 428522 ; 428694 ; 428695 ; 428900 ; 4284259 ;
Abstract
A magnetic recording medium comprising a non-magnetic support, a magnetic recording layer formed on one side of the support, and a back coat layer formed on the other side. The back coat layer is formed of a composition which comprises a dispersion, in a resin binder, of carbon black having a pH of 2.0 to 8.5 and a coloring power not less than 90 as determined by the ASTM method. The dispersion may further comprise a specific type of aliphatic acid-modified, fluorinated organosilicone in order to improve the travellability and durability of the medium.