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:
Jan. 31, 2006
Filed:
Jan. 28, 2003
Douglas E. Deckman, Mullica Hill, NJ (US);
William L. Maxwell, Pilesgrove, NJ (US);
William H. Buck, West Chester, PA (US);
Mark D. Winemiller, Clarksboro, NJ (US);
David J. Baillargeon, Cherry Hill, NJ (US);
Douglas E. Deckman, Mullica Hill, NJ (US);
William L. Maxwell, Pilesgrove, NJ (US);
William H. Buck, West Chester, PA (US);
Mark D. Winemiller, Clarksboro, NJ (US);
David J. Baillargeon, Cherry Hill, NJ (US);
ExxonMobil Research and Engineering Company, Annandale, NJ (US);
Abstract
The present invention provides a viscosity index improving lubricant additive which comprises an olefinic oligomer of about 2,000 to about 20,000 number average molecular weight having a viscosity of 75 to about 3,000 cSt at 100° C. and a hydrocarbyl aromatic which contains at least about 5% of its weight from aromatic moieties having a viscosity of about 3 to about 50 cSt at 100° C. where the weight ratio of hydrocarbyl aromatic component to olefin oligomer is from about 1:2 to about 50:1. In another aspect, the invention provides for a lubricating oil composition comprising a base oil and the instant viscosity index improving additive.