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:
May. 04, 2010
Filed:
Nov. 24, 2005
Akihiko Shimura, Kitaibaraki, JP;
Tatsuya Hashimoto, Kitaibaraki, JP;
Akihiko Shimura, Kitaibaraki, JP;
Tatsuya Hashimoto, Kitaibaraki, JP;
NOK Kluber Co., Ltd., Tokyo, JP;
Abstract
A lubricating oil composition, which comprises a perfluoropolyether base oil, and a fluorine-containing polyether diphosphonic acid ester, represented by the following general formula:(RO)(RO)P(O)(CH)CF(CF)[OCFCF(CF)]O(CF)O[CF(CF)CFO]CF(CF)(CH)P(O)(OR)(OR)(where R, R, R, and Rare hydrogen atoms, alkyl groups, cycloalkyl groups, aryl groups, alkylaryl groups, aralkyl groups, or any of the foregoing groups can be halogen atom-substituted groups, subscripts a, b, c, d, and e are in conditions of 2≦a+e≦8, b+d≦28, and 1≦c≦10, and b and d can be 0), and a grease composition which further contains a thickening agent in addition to the lubricating oil composition, have distinguished abrasion resistance and rust preventiveness without deteriorating the heat resistance inherent in the lubricating oil and the grease containing a perfluoropolyether oil as a base oil.