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. 30, 1991
Filed:
Jan. 19, 1989
Applicant:
Inventors:
Assignee:
Hitachi Maxell, Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
428329 ; 428402 ; 428694 ; 428900 ;
Abstract
A magnetic metallic powder comprising metal iron, at least 0.1% by weight of manganese based on the weight of metal iron and at least one alkaline earth metal in an amount 1 to 50 times the weight of manganese and a magnetic recording medium having a magnetic layer comprising the magnetic metallic powder, which magnetic layer has improved durability as well as improved magnetic characteristics and electromagnetic conversion characteristics.