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:
Jan. 29, 2008
Filed:
Oct. 06, 2004
Ken Kobayashi, Kanagawa, JP;
Tomoe Sato, Kanagawa, JP;
Yutaka Iwamoto, Kanagawa, JP;
Tadashi Ozue, Kanagawa, JP;
Seiichi Onodera, Miyagi, JP;
Takahiro Kawana, Miyagi, JP;
Ken Kobayashi, Kanagawa, JP;
Tomoe Sato, Kanagawa, JP;
Yutaka Iwamoto, Kanagawa, JP;
Tadashi Ozue, Kanagawa, JP;
Seiichi Onodera, Miyagi, JP;
Takahiro Kawana, Miyagi, JP;
Sony Corporation, Tokyo, JP;
Abstract
The present invention provides a lubricant capable of holding an excellent lubricating property under various types of service conditions, maintaining a lubricating effect for a long period of time and providing excellent traveling property, abrasion resistance, durability and the like, a recording medium using the lubricant and a carboxylic acid type compound constituting the lubricant. The lubricant is formed by using a carboxylic acid type compound having at least two carboxyl groups and one ester bond as represented by the following general formula (1) (for example, a compound as represented by the following chemical formula (1)) as a constituting mixture and, then, the thus-formed lubricant is allowed to be contained on or in a recording layer of the recording medium: in which Rf represents a non-substituted or substituted, saturated or unsaturated, fluorine-containing hydrocarbon group or hydrocarbon group; Es represents an ester bond; and R may be omitted or represent a non-substituted or substituted, saturated or unsaturated hydrocarbon group.