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:
Oct. 08, 1991
Filed:
Feb. 20, 1991
Applicant:
Inventors:
Toshio Tsuno, Tsukuba, JP;
Shinya Katayama, Tsukuba, JP;
Shinya Kawakita, Yotsukaichi, JP;
Tomoyasu Shimizu, Tsukuba, JP;
Assignee:
Nippon Sheet Glass Co., Ltd., Osaka, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
428448 ; 428694 ; 428695 ; 428900 ;
Abstract
In a magnetic recording medium having a layer of a perfluoroalkylpolyether-based liquid lubricant as an uppermost layer, the liquid lubricant has an atomic group including an aromatic ring at a terminal end of a perfluoropolyether main chain, and is coated on an inorganic oxide. Therefore, adhesion force of the lubricant is greatly improved, and interaction within the lubricant can be decreased, thus realizing a magnetic recording medium having excellent lubricity and wear resistance.