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. 14, 1994
Filed:
Jun. 17, 1991
Applicant:
Inventors:
Narito Goto, Hino, JP;
Katsuyuki Takeda, Hino, JP;
Kunitsuna Sasaki, Hino, JP;
Nobuyuki Sekiguchi, Hino, JP;
Assignee:
Konica Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B32B / ; G11B / ;
U.S. Cl.
CPC ...
428323 ; 428329 ; 428694 ; 428900 ;
Abstract
A magnetic recording tape of plural magnetic coating layers, which has excellent properties of both the electromagnetic conversion properties, particularly the chromatic output, and the corrosion resistance is disclosed. The top layer contains magnetic metal powder having the weight ratio of Al to Fe being 0.005 to 0.2, and the lower layer has the coercive force of not less than 650 Oe and not more than 1200 Oe.