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:
Jun. 02, 1987
Filed:
Apr. 25, 1985
Applicant:
Inventors:
Takahito Miyoshi, Odawara, JP;
Toshimitu Okutu, Minami-ashigara, JP;
Masahiro Utumi, Hadano, JP;
Masaaki Fujiyama, Minami-ashigara, JP;
Nobuo Aoki, Minami-ashigara, JP;
Assignee:
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
428323 ; 427128 ; 427131 ; 428328 ; 428329 ; 428403 ; 428694 ; 428695 ; 428900 ; 428336 ;
Abstract
A magnetic recording medium including a nonmagnetic support having a magnetic layer on one side thereof and a backing layer on the opposite side thereof, said backing layer comprising a fatty acid having 12 or more carbon atoms and copper or copper ions. Fatty acid is saturated or unsaturated, and copper is 0.2 micron or less in size.