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:
May. 13, 1980
Filed:
Sep. 25, 1978
Applicant:
Inventors:
Assignee:
Fuji Photo Film Co., Ltd., Minami-ashigara, JP;
Primary Examiner:
Int. Cl.
CPC ...
H01F / ;
U.S. Cl.
CPC ...
428323 ; 428328 ; 428329 ; 428337 ; 428339 ; 428341 ; 428342 ; 428411 ; 428412 ; 428422 ; 428474 ; 428480 ; 428523 ; 428457 ; 428539 ; 428900 ; 427 48 ; 427128 ; 427132 ;
Abstract
This invention relates to a magnetic recording medium comprising a support base having a surface roughness of at most 0.33 micron, a magnetic recording layer having a Young's modulus of at least 5.times.10.sup.10 dyne/cm.sup.2 and being provided on one side of the base and a cationic surface active agent layer provided on the other side of the base in a proportion of 0.2 to 500 mg/m.sup.2.