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:
Feb. 18, 2020
Filed:
Feb. 10, 2014
Applicant:
Idemitsu Kosan Co., Ltd, Chiyoda-ku, JP;
Inventors:
Jitsuo Shinoda, Ichihara, JP;
Shinji Aoki, Ichihara, JP;
Assignee:
IDEMITSU KOSAN CO., LTD., Chiyoda-ku, JP;
Primary Examiner:
Int. Cl.
CPC ...
C10M 161/00 (2006.01); C10M 169/04 (2006.01);
U.S. Cl.
CPC ...
C10M 161/00 (2013.01); C10M 169/044 (2013.01); C10M 2203/1025 (2013.01); C10M 2205/022 (2013.01); C10M 2209/084 (2013.01); C10M 2209/103 (2013.01); C10M 2215/064 (2013.01); C10M 2215/086 (2013.01); C10M 2215/223 (2013.01); C10M 2215/28 (2013.01); C10M 2223/04 (2013.01); C10M 2223/041 (2013.01); C10M 2223/043 (2013.01); C10M 2229/02 (2013.01);
Abstract
A lubricating oil composition contains: a base oil with a kinematic viscosity at 40 degrees C. in a range from 1 mm/s to 200 mm/s, a viscosity index of 80 or more and a sulfur content of less than 0.03 mass %; a component (A) being a polyacrylate compound with a mass average molecular weight in a range from 10,000 to 100,000; and a component (B) being at least one of phosphorus compounds represented by a formula (1) below. A content of the component (B) is in a range from 0.05 mass % to 2.0 mass % of a total amount of the composition, and a viscosity index of the composition is 160 or more.