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. 11, 1999
Filed:
Aug. 27, 1997
Seiichi Hisano, Chiba, JP;
Kazuhisa Saito, Okayama, JP;
Kazushi Sano, Okayama, JP;
Shinichi Konno, Okayama, JP;
Yoshichika Horikawa, Okayama, JP;
Yasuhiko Aihara, Okayama, JP;
Dowa Mining Co., Ltd., Tokyo, JP;
Abstract
A coating type magnetic recording medium having a multilayer structure exhibits excellent strength, surface smoothness, and weather resistance is formed on a substrate, and comprises a magnetic layer of magnetic particles dispersed in a resinous binder, and a non-magnetic layer of non-magnetic particles dispersed in a resinous binder. The magnetic particles are composed of acicular ferromagnetic metal particles of Fe containing Co, Al, rare earth elements, periodic table group 1a and 2a elements. The non-magnetic particles are composed of acicular particles of .alpha.-FeOOH.