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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 9353329 B1

PDFFull Text
Date of Patent:
May. 31, 2016

Filed:

Jan. 20, 2012

Lubricating oil composition

Applicants:

Hiroya Miyamoto, Tokyo, JP;

Akira Yaguchi, Tokyo, JP;

Inventors:

Hiroya Miyamoto, Tokyo, JP;

Akira Yaguchi, Tokyo, JP;

Assignee:

JX Nippon Oil & Energy Corporation, Tokyo, JP;

Attorney:

Panitch Schwarze Belisario & Nadel LLP

Primary Examiner:

Ellen McAvoy

Int. Cl.
CPC ...
C10M 105/04 (2006.01); C10M 145/14 (2006.01); C10M 171/02 (2006.01); C10M 143/04 (2006.01); C10M 143/12 (2006.01); C10M 169/04 (2006.01);
U.S. Cl.
CPC ...
C10M 145/14 (2013.01); C10M 143/04 (2013.01); C10M 143/12 (2013.01); C10M 169/041 (2013.01); C10M 171/02 (2013.01); C10M 2203/1025 (2013.01); C10M 2205/022 (2013.01); C10M 2205/04 (2013.01); C10M 2209/084 (2013.01); C10M 2219/068 (2013.01); C10M 2223/045 (2013.01); C10M 2227/066 (2013.01); C10N 2220/022 (2013.01); C10N 2230/02 (2013.01); C10N 2230/04 (2013.01); C10N 2230/43 (2013.01); C10N 2230/54 (2013.01); C10N 2230/68 (2013.01); C10N 2230/74 (2013.01); C10N 2240/10 (2013.01); C10N 2240/201 (2013.01);
Abstract

The present invention provides a lubricating oil composition for an internal combustion engine used mainly to drive a generator and to improve the fuel economy thereof. The composition comprises (A) a base oil being a hydrocarbon base oil having a ratio (CA/CB) of the proportion of the component of 24 or fewer carbon atoms (CA) and the proportion of the component of 25 or more carbon atoms (CB) in the carbon number distribution obtained by gas chromatography distillation of 2.0 or higher, the composition having a ratio (Vs/Vk) of the 80° C. high-temperature high-shear (HTHS) viscosity (Vk) and the 150° C. HTHS viscosity (Vs) of 0.4 or higher and a 100° C. kinematic viscosity of 5.2 mm/s or higher and 8 mm/s or lower.

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