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:
Mar. 11, 1997
Filed:
Apr. 22, 1996
Applicant:
Inventors:
Kiyoshi Asano, Yokkaichi, JP;
Arata Koyama, Yokkaichi, JP;
Nobusuke Takumi, Yokkaichi, JP;
Shigeru Takatori, Yokkaichi, JP;
Kouichi Tamura, Yokkaichi, JP;
Tokuo Suita, Yokkaichi, JP;
Assignee:
Ishihara Sangyo Kaisha, Ltd., Osaka, JP;
Primary Examiner:
Int. Cl.
CPC ...
C04B / ;
U.S. Cl.
CPC ...
252 6256 ; 428403 ;
Abstract
Cobalt-containing magnetic iron oxide particles extremely suitable for magnetic recording mediums, especially for image recording mediums and a process for producing the same from the precursor, .gamma.-FeOOH which is advantageous in industry are disclosed. Cobalt-containing magnetic iron oxide particles satisfying the following equations (1), (2) and (3):