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:
Sep. 11, 1979
Filed:
Aug. 26, 1977
Noboru Takahashi, Yokohama, JP;
Sadao Ozaki, Yokohama, JP;
Tunehide Naruse, Yokohama, JP;
Hiromasa Isono, Yokohama, JP;
Toshikazu Nishihara, Yokohama, JP;
Victor Company of Japan, Limited, Yokohama, JP;
Abstract
A magnetic metallic powder which is essentially of iron or its alloy with at least one other metal and features a good resistance to oxidation by air as well as a large value for saturation magnetization is obtained by the reduction of an oxide powder prepared or treated in a basic liquid phase environment the oxide powder ultimately to have a pH value not smaller than 6.0. A magnetic recording medium consisting of a nonmagnetic base and a thin magnetic layer comprising the metallic powder dispersed in a polymer binder serves for high density recording purposes and long retains its excellent physical properties.