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. 22, 2012
Filed:
Apr. 22, 2003
Hirotsugu Kinoshita, Yokohama, JP;
Souichi Nomura, Tokyo, JP;
Takashi Arai, Yokohama, JP;
Kiyomi Sakamoto, Yokohama, JP;
Hirotsugu Kinoshita, Yokohama, JP;
Souichi Nomura, Tokyo, JP;
Takashi Arai, Yokohama, JP;
Kiyomi Sakamoto, Yokohama, JP;
Nippon Oil Corporation, Tokyo, JP;
Abstract
A grease composition containing a lubricant base oil, diurea compounds represented by the following general formulas (1) to (3), and at least one species selected from the group consisting of paraffin oxides and phosphorus compounds; wherein respective contents of the diurea compounds represented by the following general formulas (1) to (3) satisfy conditions defined by the following expressions (4) and (5); and wherein the total content of the paraffin oxides and phosphorus compounds is 0.1 to 15 mass % based on the total amount of the grease composition: where Ris a hydrocarbon group containing an aromatic ring, Ris a divalent hydrocarbon group, and Ris a hydrocarbon group containing an aliphatic ring;5≦≦30  (4)0.3≦(+0.5×)/()≦0.7  (5)where W, W, and Ware respective contents (mass %) of the diurea compounds represented by general formulas (1) to (3) based on the total amount of the grease composition.