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. 05, 1999
Filed:
Aug. 26, 1998
Charles Herbert Bovington, Faringdon, GB;
Exxon Chemical Patents Inc, Linden, NJ (US);
Abstract
A lubricant composition capable of improving the fuel economy of an internal combustion engine and comprising a base oil as a major component and from about 2 to about 15 wt. %, based on the weight of composition, of a fuel economy improving additive having a viscosity greater than the viscosity of the bulk lubricant and being selected such that the lubricant is characterized by (1) a positive deviation from that of a theoretical line when the elastohydrodynamic (EHD) film thickness thereof is plotted against entrainment speed on a log basis, and by (2) a traction coefficient under both hydrodynamic and mixed lubrication conditions which is lower than it would have been if the fuel economy improving additive were not present in the lubricant is disclosed.