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.:
Date of Patent:
Feb. 11, 2025
Filed:
Jan. 20, 2021
Applicant:
Idemitsu Kosan Co., Ltd., Chiyoda-ku, JP;
Inventors:
Moritsugu Kasai, Tokyo, JP;
Tatsuya Kusumoto, Tokyo, JP;
Assignee:
Idemitsu Kosan Co., Ltd., Chiyoda-ku, JP;
Primary Examiner:
Int. Cl.
CPC ...
G01N 33/28 (2006.01); C10M 125/22 (2006.01); C10M 129/52 (2006.01); C10M 129/54 (2006.01); C10M 169/04 (2006.01); G01N 33/30 (2006.01); C10N 10/04 (2006.01); C10N 30/00 (2006.01); C10N 30/04 (2006.01);
U.S. Cl.
CPC ...
G01N 33/2888 (2013.01); C10M 125/22 (2013.01); C10M 129/52 (2013.01); C10M 129/54 (2013.01); C10M 169/04 (2013.01); G01N 33/30 (2013.01); C10M 2201/084 (2013.01); C10M 2207/142 (2013.01); C10M 2207/144 (2013.01); C10N 2010/04 (2013.01); C10N 2030/04 (2013.01); C10N 2030/52 (2020.05);
Abstract
A method for utilizing a lubricating oil composition in which the content of a metal-based cleaning agent (X) having a base value of 100 mgKOH/g or less is 630 mass ppm or less in terms of metal atoms, and the content of sulfated ash is 1.5 mass % or less. The method includes measuring at least one physical property value among the capacitance and the dielectric constant of the lubricating oil composition while using the lubricating oil composition, and evaluating the progress of degradation of the lubricating oil composition.