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:
Jan. 09, 1996
Filed:
Jul. 29, 1993
Applicant:
Inventors:
Setsuko Kawahara, Hino, JP;
Yasushi Nakano, Hino, JP;
Yuji Shimizu, Hino, JP;
Shoichi Sugitani, Hino, JP;
Assignee:
Konica Corporation, , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ; B32B / ; B32B / ;
U.S. Cl.
CPC ...
428212 ; 428329 ; 428336 ; 428685 ; 428900 ; 4286 / ; 4286 / ; 4286 / ; 4286 / ; 4286 / ;
Abstract
A magnetic recording medium having two magnetic layers is disclosed. The magnetic recording medium has a surface fatty acid content of 0.38 to 2.53 .mu.g per square centimeter and a magnetic layer closest to a support contains ferromagnetic powder of Co-containing FeOx wherein x represents 1.33 to 1.43. It is improved in electromagnetic conversion characteristics, light-shielding property and erasing property, and is suitably used for audio or video recording medium.