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. 02, 2007
Filed:
Oct. 16, 2003
Applicant:
Yoshiaki Nakata, Tochigi, JP;
Inventor:
Yoshiaki Nakata, Tochigi, JP;
Assignees:
Sony Corporation, Tokyo, JP;
Sony Chemical & Information Device Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 69/66 (2006.01);
U.S. Cl.
CPC ...
Abstract
A novel perfluoropolyether derivative, which has at least one ester bond and is useful as a lubricant with a decomposition temperature of 300° C. or more, is obtained by an esterification reaction between a perfluoropolyether diol having hydroxyl groups at both ends thereof and represented by the formula (1) and a perfluoropolyether dicarboxylic acid having carboxyl groups at both ends thereof and represented by the formula (2):HOCH—R—CHOH  (1)HOOC—R'—COOH  (2)wherein each of R and R′ is a perfluoroether group.