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:
Jun. 07, 2022
Filed:
Aug. 07, 2017
Applicant:
Idemitsu Kosan Co., Ltd., Chiyoda-ku, JP;
Inventors:
Shinji Aoki, Sodegaura, JP;
Shota Hirakawa, Fukuoka, JP;
Assignee:
IDEMITSU KOSAN CO., LTD., Chiyoda-ku, JP;
Primary Examiner:
Int. Cl.
CPC ...
C10M 169/04 (2006.01); C10M 137/08 (2006.01); C10M 105/38 (2006.01); C10M 133/12 (2006.01); C10M 105/34 (2006.01); C10N 20/02 (2006.01); C10N 20/04 (2006.01); C10N 30/02 (2006.01); C10N 30/10 (2006.01); C10N 30/12 (2006.01); C10N 30/00 (2006.01); C10N 40/02 (2006.01); C10N 40/04 (2006.01); C10N 40/06 (2006.01); C10N 40/08 (2006.01); C10N 40/12 (2006.01); C10N 40/30 (2006.01); C10N 40/00 (2006.01);
U.S. Cl.
CPC ...
C10M 169/04 (2013.01); C10M 105/34 (2013.01); C10M 105/38 (2013.01); C10M 133/12 (2013.01); C10M 137/08 (2013.01); C10M 2207/023 (2013.01); C10M 2207/026 (2013.01); C10M 2207/2835 (2013.01); C10M 2207/34 (2013.01); C10M 2209/1033 (2013.01); C10M 2209/1055 (2013.01); C10M 2215/064 (2013.01); C10M 2215/065 (2013.01); C10M 2215/068 (2013.01); C10M 2215/223 (2013.01); C10M 2219/044 (2013.01); C10M 2223/04 (2013.01); C10M 2223/041 (2013.01); C10M 2223/043 (2013.01); C10N 2020/02 (2013.01); C10N 2020/04 (2013.01); C10N 2030/02 (2013.01); C10N 2030/10 (2013.01); C10N 2030/12 (2013.01); C10N 2030/24 (2020.05); C10N 2030/45 (2020.05); C10N 2040/02 (2013.01); C10N 2040/04 (2013.01); C10N 2040/06 (2013.01); C10N 2040/08 (2013.01); C10N 2040/12 (2013.01); C10N 2040/135 (2020.05); C10N 2040/30 (2013.01);
Abstract
Provided is a lubricating oil composition comprising a base oil (A) containing a polyalkylene glycol (A1) and a polyol ester (A2), a phosphorus-based rust inhibitor (B), and an antioxidant (C) containing an amine-based antioxidant (C1). The lubricating oil composition exhibits a strong effect for suppressing sludge sedimentation even when used for an extended period of time in a high-temperature environment, and has excellent demulsibility and rust preventive properties, and therefore, can be suitably used in turbomachinery, compressors, hydraulic equipment, and machine tools.