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. 14, 1985
Filed:
Sep. 13, 1983
Applicant:
Inventors:
Shigeo Shimizu, Yokohama, JP;
Toshio Kato, Yamato, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
428694 ; 427131 ; 427132 ; 428900 ; 360134 ; 360135 ; 360136 ;
Abstract
Magnetic recording media suitable for use in vertical magnetization recording systems are described. The media comprise a magnetic layer on at least one side of a substrate. The magnetic layer is made of a specific type of quaternary alloy. The alloy essentially consists of from 3 to 42 wt % of Co, from 54 to 89 wt % of Ni, from 4 to 8 wt % of P, and from 0.1 to 3.2 wt % of Zn provided that (7.2 X.sub.P +12.8) wt %.ltoreq.X.sub.Ni .ltoreq.(7.2 X.sub.P +43.2) wt % in which X.sub.P represents a content of P and X.sub.Ni represents a content of Ni, both expressed by wt %.