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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 11746303 B1

PDFFull Text
Date of Patent:
Sep. 05, 2023

Filed:

Jan. 31, 2020

Grease composition

Applicant:

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

Inventors:

Kouji Takane, Chiba, JP;

Go Watanabe, Chiba, JP;

Akihiro Shishikura, Chiba, JP;

Jun Yamashita, Funabashi, 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 169/00 (2006.01); F16C 33/10 (2006.01); C10M 101/02 (2006.01); C10M 107/02 (2006.01); C10M 115/08 (2006.01); C10M 129/74 (2006.01); C10M 133/12 (2006.01); C10M 141/06 (2006.01); C10N 20/06 (2006.01); C10N 30/02 (2006.01); C10N 30/10 (2006.01); C10N 30/12 (2006.01); C10N 40/02 (2006.01); C10N 50/10 (2006.01);
U.S. Cl.
CPC ...
C10M 169/00 (2013.01); C10M 101/02 (2013.01); C10M 107/02 (2013.01); C10M 115/08 (2013.01); C10M 129/74 (2013.01); C10M 133/12 (2013.01); C10M 141/06 (2013.01); F16C 33/102 (2013.01); C10M 2203/003 (2013.01); C10M 2205/0206 (2013.01); C10M 2207/283 (2013.01); C10M 2215/1026 (2013.01); C10M 2215/26 (2013.01); C10N 2020/06 (2013.01); C10N 2030/02 (2013.01); C10N 2030/10 (2013.01); C10N 2030/12 (2013.01); C10N 2040/02 (2013.01); C10N 2050/10 (2013.01);
Abstract

The present invention relates to a grease composition which can impart excellent durability to a bearing used under a high-speed rotation condition with a DN value of 100,000 or more, wherein the grease composition contains a base oil (A) and a urea-based thickener (B), and particles containing the urea-based thickener (B) in the grease composition satisfy requirement (I) that the particles have an arithmetic mean particle diameter of 2.0 μm or less on an area basis when measured by a laser diffraction scattering method. The grease composition is used for a bearing used under a high-speed rotation condition with a DN value of 100,000 or more.

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