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:
Nov. 11, 2008
Filed:
Mar. 07, 2006
Frances E. Lockwood, Georgetown, KY (US);
Zhiqiang Zhang, Lexington, KY (US);
Gefei Wu, Lexington, KY (US);
Thomas R. Smith, Lexington, KY (US);
Frances E. Lockwood, Georgetown, KY (US);
Zhiqiang Zhang, Lexington, KY (US);
Gefei Wu, Lexington, KY (US);
Thomas R. Smith, Lexington, KY (US);
Ashland Licensing and Intellectual Property, LLC (ALIP), Lexington, KY (US);
Abstract
The present invention relates to a novel use of nanomaterials as a viscosity modifier and thermal conductivity improver for gear oil and other lubricating oil compositions. The gear oils of the instant invention have a higher viscosity index, higher shear stability, and improved thermal conductivity compared to currently available gear oils. The preferred nanoparticles also impart a reduction in the coefficient of friction, including reduced friction in the boundary lubrication regime. These properties are obtained by replacing part or all of the polymer thickener or viscosity index improver or some other part of the composition normally used in gear oils with nanomaterials of suitable shape, size, and composition.