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:
Dec. 17, 2013
Filed:
Mar. 19, 2008
Applicants:
Tahei Okada, Chiba, JP;
Shigeo Hara, Chiba, JP;
Inventors:
Tahei Okada, Chiba, JP;
Shigeo Hara, Chiba, JP;
Assignee:
Idemitsu Kosan Co., Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C10M 101/00 (2006.01); C10M 135/18 (2006.01); C10M 129/70 (2006.01); C10M 129/74 (2006.01); C10M 129/76 (2006.01);
U.S. Cl.
CPC ...
Abstract
To provide a gear oil composition containing a base oil, and compounded therein, (A) an ashless dithiocarbamate compound and (B) an ester of pentaerythritol and a Cto Cbranched fatty acid, the ester having a hydroxyl value of 20 to 100 mg KOH/g. The gear oil composition has a high transmission efficiency and shows both of resistance to sludge formation and extreme pressure property.