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 11326120 B1

Date of Patent:

May. 10, 2022

Filed:

Aug. 03, 2018

Lubricating oil composition, internal combustion engine, and lubrication method for internal combustion engine

Applicant:

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

Inventor:

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 107/10 (2006.01); C10M 101/00 (2006.01); C10M 105/18 (2006.01); C10M 135/18 (2006.01); C10M 145/14 (2006.01); C10M 169/04 (2006.01); C10N 20/00 (2006.01); C10N 30/00 (2006.01); C10N 10/12 (2006.01); C10N 20/02 (2006.01); C10N 20/04 (2006.01); C10N 30/02 (2006.01); C10N 40/25 (2006.01);

U.S. Cl.

CPC ...

C10M 107/10 (2013.01); C10M 101/00 (2013.01); C10M 105/18 (2013.01); C10M 135/18 (2013.01); C10M 145/14 (2013.01); C10M 169/044 (2013.01); C10M 2205/022 (2013.01); C10M 2205/024 (2013.01); C10M 2205/0285 (2013.01); C10M 2205/04 (2013.01); C10M 2205/06 (2013.01); C10M 2207/0406 (2013.01); C10M 2209/084 (2013.01); C10M 2219/068 (2013.01); C10M 2223/045 (2013.01); C10N 2010/12 (2013.01); C10N 2020/02 (2013.01); C10N 2020/04 (2013.01); C10N 2020/071 (2020.05); C10N 2030/02 (2013.01); C10N 2030/54 (2020.05); C10N 2030/74 (2020.05); C10N 2040/25 (2013.01);

Abstract

The present invention relates to a lubricating oil composition containing a base oil (A) containing an olefin-based polymer (A1) having an area ratio of a peak derived from a hydride (A11) of a decene trimer of 80% or more relative to 100% of a total area of peaks derived from the olefin-based polymer (A1) detected in a chromatogram and having predetermined kinematic viscosity, flash point, and pour point, a viscosity index improver (B) containing a comb-shaped polymer (B1), and an organic molybdenum-based compound (C), in which the content of the comb-shaped polymer (B1) is regulated within a specified range and having a HTHS viscosity at each of 150° C. and 50° C. of the lubricating oil composition and a NOACK value in predetermined ranges, respectively.

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