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:
Jul. 28, 2026
Filed:
Mar. 25, 2021
Applicant:
Idemitsu Kosan Co.,ltd., Chiyoda-ku, JP;
Inventors:
Kazushige Matsubara, Chiba, JP;
Hiroyuki Tatsumi, Chiba, JP;
Assignee:
IDEMITSU KOSAN CO., LTD., Chiyoda-ku, JP;
Primary Examiner:
Int. Cl.
CPC ...
C10M 169/04 (2006.01); C10M 135/36 (2006.01); C10M 137/02 (2006.01); C10M 141/10 (2006.01); C10N 40/00 (2006.01);
U.S. Cl.
CPC ...
C10M 141/10 (2013.01); C10M 135/36 (2013.01); C10M 137/02 (2013.01); C10M 169/04 (2013.01); C10M 2203/003 (2013.01); C10M 2219/106 (2013.01); C10M 2223/049 (2013.01); C10N 2040/40 (2020.05);
Abstract
A lubricating oil composition containing a phosphite ester derivative (A) having at least one alkyl group having 1 to 20 carbon atoms in which one —CH— group is substituted with a —S— group, and a thiadiazole derivative (B). A method of lubricating an electric drive unit with the lubricating oil composition and an electric drive unit including the lubricating oil composition.