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:
Mar. 23, 2021
Filed:
Nov. 30, 2017
Cosmo Oil Lubricants Co., Ltd., Tokyo, JP;
Cosmo Oil Lubricants Co., Ltd., Tokyo, JP;
Abstract
A lubricating oil composition including: at least one base oil selected from a mineral oil-based lubricating oil, a synthetic oil-based lubricating oil, or a mixed oil thereof, and zinc dialkyldithiophosphates X consisting of the compounds Zto Zrepresented by the formulae (1) to (3) are contained, in which a total content of the zinc dialkyldithiophosphates X is 0.02% by mass or more in terms of phosphorus concentration with respect to the total mass of the oil composition, and the zinc dialkyldithiophosphates X satisfy the formulae (a) to (c). In the formula (1), each of Rto Rindependently represents a linear or branched primary alkyl group having from 10 to 20 carbon atoms. In the formula (2), each of Rto Rindependently represents a linear or branched primary alkyl group having from 7 to 9 carbon atoms. In the formula (3), each of Rto Rindependently represents a linear or branched primary or secondary alkyl group having from 3 to 6 carbon atoms. The formula (a) to (c) are shown in the specification.