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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 10883062 B1

PDFFull Text
Date of Patent:
Jan. 05, 2021

Filed:

Dec. 14, 2016

Mineral oil-based base oil, lubricating oil composition, equipment, lubricating method, and grease composition

Applicant:

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

Inventors:

Shinji Aoki, Sodegaura, JP;

Moritsugu Kasai, Chiba, JP;

Asami Koga, Chiba, JP;

Assignee:

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

Attorney:

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

Primary Examiner:

Vishal V Vasisth

Int. Cl.
CPC ...
C10M 171/02 (2006.01); C10M 115/08 (2006.01); C10M 117/04 (2006.01); C10M 169/02 (2006.01); C10M 101/02 (2006.01); C10N 20/02 (2006.01); C10N 20/00 (2006.01); C10N 30/02 (2006.01); C10N 30/06 (2006.01); C10N 30/00 (2006.01); C10N 40/08 (2006.01); C10N 40/20 (2006.01); C10N 40/30 (2006.01); C10N 50/10 (2006.01);
U.S. Cl.
CPC ...
C10M 101/025 (2013.01); C10M 101/02 (2013.01); C10M 115/08 (2013.01); C10M 117/04 (2013.01); C10M 169/02 (2013.01); C10M 171/02 (2013.01); C10M 2203/1006 (2013.01); C10M 2203/1025 (2013.01); C10M 2207/026 (2013.01); C10M 2207/1285 (2013.01); C10M 2215/064 (2013.01); C10M 2215/065 (2013.01); C10M 2215/223 (2013.01); C10M 2215/28 (2013.01); C10M 2217/0456 (2013.01); C10M 2219/106 (2013.01); C10M 2223/02 (2013.01); C10N 2020/02 (2013.01); C10N 2020/065 (2020.05); C10N 2020/069 (2020.05); C10N 2020/071 (2020.05); C10N 2030/02 (2013.01); C10N 2030/06 (2013.01); C10N 2030/43 (2020.05); C10N 2040/08 (2013.01); C10N 2040/20 (2013.01); C10N 2040/30 (2013.01); C10N 2050/10 (2013.01);
Abstract

The present invention provides a mineral base oil having a kinetic viscosity at 100° C. of 7 mm/s or more and less than 10 mm/s, a viscosity index of 100 or more, and a temperature gradient Δ|η*| complex viscosity between two temperature points of −5° C. and −15° C. of 240 mPa·s/° C. or less as measured with a rotary rheometer at an angular velocity of 6.3 rad/s. The use of the mineral base oil enables easy preparation of a lubricating oil composition and a grease composition having excellent oxidation stability while ensuring the freedom of selection of additives.

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Aoki, Shinji. (2021). Mineral oil-based base oil, lubricating oil composition, equipment, lubricating method, and grease composition (U.S. Patent No. 10883062). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/10883062

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