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:
Jul. 16, 1996
Filed:
Jan. 31, 1995
Applicant:
Inventors:
Mitsuyoshi Shoji, Ibaraki-ken, JP;
Takayuki Nakakawaji, Hitachi, JP;
Hiroshi Sasaki, Ibaraki-ken, JP;
Yutaka Ito, Takahagi, JP;
Shigeki Komatsuzaki, Mito, JP;
Hiroyuki Matsumoto, Ebina, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
428408 ; 428421 ; 428422 ; 4286 / ; 4286 / ; 428900 ;
Abstract
A magnetic recording medium is produced by coating a body having (a) a non-magnetic substrate, (b) at least one magnetic substance layer formed on the non-magnetic substrate and (c) at least one protective layer formed on the magnetic substance layer which contains at least one member selected from the group consisting of inorganic oxides, graphite and amorphous allotropes of carbon, with a solid surface modifier containing (i) an ammonium carboxylate type fluorine-containing compound having the formula,