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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.:

US 11208610 B1

PDFFull Text
Date of Patent:
Dec. 28, 2021

Filed:

Jan. 16, 2017

Lubricant oil composition

Applicant:

Idemitsu Kosan Co., Ltd., Chiyoda-ku, JP;

Inventors:

Shinji Aoki, Sodegaura, JP;

Hidenori Torii, Kisarazu, JP;

Assignee:

IDEMITSU KOSAN CO., LTD., Chiyoda-ku, JP;

Attorney:

Oblon, McClelland, Maier & Neustadt, L.L.P.

Primary Examiner:

James C Goloboy

Int. Cl.
CPC ...
C10M 137/04 (2006.01); C10M 133/12 (2006.01); C10M 169/04 (2006.01); C10M 101/02 (2006.01); C10N 20/02 (2006.01); C10N 30/04 (2006.01); C10N 30/08 (2006.01); C10N 30/10 (2006.01); C10N 30/00 (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 137/04 (2013.01); C10M 101/02 (2013.01); C10M 133/12 (2013.01); C10M 169/04 (2013.01); C10M 2203/1006 (2013.01); C10M 2207/288 (2013.01); C10M 2209/084 (2013.01); C10M 2215/064 (2013.01); C10M 2215/065 (2013.01); C10M 2215/223 (2013.01); C10M 2223/04 (2013.01); C10N 2020/02 (2013.01); C10N 2030/04 (2013.01); C10N 2030/08 (2013.01); C10N 2030/10 (2013.01); C10N 2030/40 (2020.05); C10N 2030/43 (2020.05); 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 containing a base oil (A) and an amine-based antioxidant (B), wherein the component (B) contains a phenyl-naphthylamine (B1), an alkylphenyl-naphthylamine (B2) and a di(alkylphenyl)amine (B3), the content of the component (B1) is 2.0 to 10.0% by mass relative to 100% by mass of the total amount of the component (B), the content of the component (B2) is 40.0 to 90.0% by mass relative to 100% by mass of the total amount of the component (B), and the content of the component (B3) is 8.0 to 50.0% by mass relative to 100% by mass of the total amount of the component (B). The lubricating oil composition maintains excellent oxidation stability even in long-term use in high-temperature environments, and has an excellent lifetime and is excellent also in a sludge preventing effect.

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