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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 11932822 B1

PDFFull Text
Date of Patent:
Mar. 19, 2024

Filed:

Jun. 26, 2020

Lubricating oil composition

Applicant:

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

Inventors:

Naoto Horita, Funabashi, JP;

Hiroshi Oki, Chiba, JP;

Assignee:

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

Attorney:

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

Primary Examiner:

Ellen M McAvoy

Int. Cl.
CPC ...
C10M 133/16 (2006.01); C10M 135/10 (2006.01); C10M 137/10 (2006.01); C10M 143/02 (2006.01); C10M 143/04 (2006.01); C10M 145/14 (2006.01); C10M 169/04 (2006.01); C10N 10/04 (2006.01); C10N 10/06 (2006.01); C10N 20/02 (2006.01); C10N 20/04 (2006.01); C10N 30/00 (2006.01); C10N 30/02 (2006.01); C10N 30/04 (2006.01); C10N 30/06 (2006.01); C10N 40/25 (2006.01);
U.S. Cl.
CPC ...
C10M 133/16 (2013.01); C10M 135/10 (2013.01); C10M 137/10 (2013.01); C10M 143/02 (2013.01); C10M 143/04 (2013.01); C10M 145/14 (2013.01); C10M 169/044 (2013.01); C10M 2205/022 (2013.01); C10M 2205/024 (2013.01); C10M 2209/084 (2013.01); C10M 2215/086 (2013.01); C10M 2219/044 (2013.01); C10M 2223/045 (2013.01); C10N 2010/04 (2013.01); C10N 2010/06 (2013.01); C10N 2020/02 (2013.01); C10N 2020/04 (2013.01); C10N 2030/02 (2013.01); C10N 2030/04 (2013.01); C10N 2030/06 (2013.01); C10N 2030/54 (2020.05); C10N 2030/56 (2020.05); C10N 2040/25 (2013.01);
Abstract

There is provided a lubricating oil composition which is excellent in the wear resistance and the oil film retention even when the viscosity of the composition is lowered. The lubricating oil composition comprises: a base oil (A); an imide compound (B); a calcium-based detergent (C); a polymer component (D); and a zinc dithiophosphate (E), wherein the imide compound (B) comprises at least one non-boron-modified succinic acid imide compound (Bx) selected from a succinic acid monoimide (B1x) represented by general formula (b-1) and a succinic acid bisimide (B2x) represented by general formula (b-2), and wherein the polymer compound (D) has a mass average molecular weight (Mw) of not less than 10,000 and not more than 50,000, and comprises at least one selected from an olefin polymer (D1) and a polymethacrylate (D2).

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