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:
Dec. 23, 2025
Filed:
May. 11, 2022
Exxonmobil Chemical Patents Inc., Houston, TX (US);
Chevron Oronite Company Llc, San Ramon, CA (US);
Jo Ann M. Canich, Houston, TX (US);
Jingwen Zhang, Houston, TX (US);
Sara Yue Zhang, Danville, CA (US);
David L. Morgan, Pleasanton, CA (US);
John R. Hagadorn, Houston, TX (US);
Peijun Jiang, Katy, TX (US);
Maryam Sepehr, San Ramon, CA (US);
ExxonMobil Chemical Patents Inc., Houston, TX (US);
Chevron Oronite Company LLC, San Ramon, CA (US);
Abstract
The present disclosure relates to lubricant compositions comprising a branched copolymer and methods for making such compositions. Lubricant compositions of the present disclosure comprise an oil and a copolymer and have a high temperature high shear (HTHS) viscosity of about 5 or less, shear stability index (30 cycles) of from about 2% to about 80%, a ratio of thickening efficiency to shear stability index (30 cycles) of from about 1:2 to about 1:30, a kinematic viscosity at 100° C. of from about 3 cSt to about 30 cSt, and a thickening efficiency of about 1 or more. In another class of embodiments, the present disclosure provides a lubricant composition comprising a first and a second copolymers wherein the first copolymer has an ethylene content higher than that of the second copolymer, and wherein at least one of the two copolymers is a long chain branched ethylene copolymer.