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:
Sep. 16, 2014
Filed:
Jun. 02, 2010
Marina Baum, Chagrin Falls, OH (US);
Haihu Qin, Greer, SC (US);
Brent R. Dohner, Concord, OH (US);
The Lubrizol Corporation, Wickliffe, OH (US);
Abstract
A lubricating composition contains an oil of lubricating viscosity and 0.5 to 10 percent by weight of a poly(meth)acrylate viscosity modifier polymer comprising (i) 15 weight percent to 35 weight percent monomer units of methyl(meth)acrylate, (ii) 0 to 10 weight percent monomer units of one or more C-Calkyl(meth)acrylates, (iii) 50 to 85 weight percent monomer units of one or more C-Calkyl(meth)acrylates, and (iv) 0 to 10 weight percent monomer units of one or more nitrogen-containing monomers. Such a lubricating composition exhibits a high viscosity index and may impart improved fuel economy to an internal combustion engine.