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:
Oct. 29, 2013
Filed:
Jun. 16, 2011
David A. Blain, Cherry Hill, NJ (US);
Liehpao Oscar Farng, Lawrenceville, NJ (US);
Eugenio Sanchez, Pitman, NJ (US);
Michael R. Douglass, Cherry Hill, NJ (US);
Angela S. Galiano-roth, Mullica Hill, NJ (US);
James T. Carey, Medford, NJ (US);
David A. Blain, Cherry Hill, NJ (US);
Liehpao Oscar Farng, Lawrenceville, NJ (US);
Eugenio Sanchez, Pitman, NJ (US);
Michael R. Douglass, Cherry Hill, NJ (US);
Angela S. Galiano-Roth, Mullica Hill, NJ (US);
James T. Carey, Medford, NJ (US);
ExxonMobil Research and Engineering Company, Annandale, NJ (US);
Abstract
A Group IV/Group V lubricating composition providing improved antioxidation performance comprises from 5 wt. % to 40 wt. % of a Group V base oil component, such as alkylated naphthalene, at least 30 wt. % of a Group IV base oil component, such as one or more polyalphaolefin base stocks, and from 0.25 wt. % to 1.5 wt. % of a trithiophosphate-containing compound. The trithiophosphate-containing compound is preferably CHOPS. The lubricating composition includes not greater than 5 wt. % of a Group I, Group II, or Group III base oil component, and, preferably not greater than 10 ppm heavy metal component. The lubricating composition preferably has a kinematic viscosity of from 20 cSt to 1,000 cSt at 40° C. and a viscosity index (VI) of from 130 to 200.