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:
Aug. 10, 1999
Filed:
Oct. 14, 1997
Takayuki Deno, Mito, JP;
Tsutomu Yashiro, Mito, JP;
Ikuo Matsumoto, Mito, JP;
Osamu Kobayashi, Ibaraki-ken, JP;
Noboru Watanabe, Mito, JP;
Masaru Hanayama, Ibaraki-ken, JP;
Takumu Tada, Yokohama, JP;
Toshimitsu Saitou, Mito, JP;
Victor Company of Japan, Ltd., Yokohama, JP;
Abstract
A magnetic recording medium has a substrate and a magnetic layer formed on the substrate. The magnetic layer includes magnetic powder and a binder for binding the magnetic powder on the substrate. The binder includes at least a resin component containing at least an aminoquinone structure selected from an aminoquinone structure group shown with formulas (1-1a), (1-1b), (1-3a) and (1-3b) as a constitutional unit and at least a polar group selected from a group shown with a formula (1-2) in a composition of the resin component. Thus, the magnetic recording medium has excellent corrosion resistance of the magnetic powder and excellent conservation and running durability.