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:
Aug. 09, 2022
Filed:
Jul. 28, 2016
Chevron U.s.a. Inc., San Ramon, CA (US);
The Lubrizol Corporation, Wickliffe, OH (US);
Hyun-Soo Hong, San Ramon, CA (US);
John Aleksonis Zakarian, San Ramon, CA (US);
Sona Sivakova, Wickliffe, OH (US);
Tomoya Higuchi, Wickliffe, OH (US);
Christopher Engel, Wickliffe, OH (US);
Farrukh Qureshi, Wickliffe, OH (US);
The Lubrizol Corporation, Wickliffe, OH (US);
Chevron U.S.A. Inc., San Ramon, CA (US);
Abstract
Described herein is a process, comprising: a) selecting an API Group II base stock with selected viscosity index and pour point; b) blending a base oil with the base stock, and c) adding to the base oil: i) a liquid ethylene propylene copolymer viscosity modifier that reduces a traction coefficient, and ii) an additive package, to make a driveline fluid that has a defined viscosity index and excellent shear stability. Also provided is a driveline fluid composition having the high viscosity index and excellent shear stability, comprising: a) a base oil comprising from 50 wt % to 100 wt % API Group II base stock; b) a liquid ethylene propylene copolymer viscosity modifier that reduces a traction coefficient; and c) an additive package. Further provided is a method for lubricating an axle or manual transmission by supplying the driveline fluid composition.