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:
Jul. 26, 1988
Filed:
Mar. 01, 1985
Toshiyuki Kanno, Tokyo, JP;
Hitoshi Watanabe, Hachioji, JP;
Yasutaro Yasuda, Nagoya, JP;
Shiro Kojima, Tokai, JP;
Hiroyuki Kato, Nagoya, JP;
Takashi Tsuda, Tokai, JP;
Kishiro Azuma, Tokai, JP;
Toagosei Chemical Industry Co., Ltd., Tokyo, JP;
Olympus Optical Co., Ltd., Tokyo, JP;
Abstract
A magnetic recording medium having a modified surface, consisting essentially of (a) a substrate, (b) a ferromagnetic metal thin film formed on one side of the substrate by a vacuum deposition method, an ion plating method, a sputtering method or a plating method and (c) a lubricating coating layer formed on the thin film or on the back of the substrate or on both of them. The recording medium has an improved running stability, durability and corrosion resistance.