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. 12, 2024
Filed:
Nov. 04, 2022
Chevron Oronite Company Llc, San Ramon, CA (US);
Exxonmobil Chemical Patents Inc., Houston, TX (US);
Sara Yue Zhang, Danville, CA (US);
Maryam Sepehr, San Ramon, CA (US);
David L. Morgan, Pleasanton, CA (US);
Jingwen Zhang, Houston, TX (US);
Jo Ann M. Canich, Houston, TX (US);
Peijun Jiang, Katy, TX (US);
John R. Hagadorn, Houston, TX (US);
Chase A. Eckert, Houston, TX (US);
Sarah J. Mattler, League City, TX (US);
Shuhui Kang, Houston, TX (US);
Pritesh Arjunbhai Patel, Danville, CA (US);
EXXONMOBIL CHEMICAL PATENTS INC., Houston, TX (US);
CHEVRON ORONITE COMPANY LLC, San Ramon, CA (US);
Abstract
Provided is a lubricating oil composition that includes a major amount of a lubricant base oil and a minor amount of a viscosity index improver comprising a syndiotactic propylene-based ethylene-propylene copolymer comprising: a) 2 to 20% by weight of ethylene, b) 80 to 98% by weight of propylene; c) 50 to 99% of rr triads; and d) Mw (LS) of 10 to 250 kg/mol.