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:
Sep. 18, 2018
Filed:
Jul. 06, 2016
Showa Denko K.k., Tokyo, JP;
Satoru Nakamura, Hsinchu, TW;
Taining Hung, Hsinchu, TW;
Evance Kuo, Hsinchu, TW;
Daizo Endo, Ichihara, JP;
SHOWA DENKO K.K., Minato-ku, Tokyo, JP;
Abstract
A magnetic recording mediumin which the outermost surface of a protective layeron a lubricant layerside contains carbon and nitrogen of 10 atomic % to 90 atomic %, the lubricant layeris formed by being in contact with the outermost surface, and contains a compound A of Formula (1) and a compound B of Formula (2), a mass ratio (A/B) of the compound A with respect to the compound B is 0.2 to 0.3, the average molecular weights of the compounds A and B are 1,500 to 2,000 and 1,300 to 2,400, respectively, and the average film thickness is 0.5 nm to 2 nm.R1-CHOCHCH(OH)CHOCH—R2-CHOCHCH(OH)CHOH   (1)