Patents by Inventor Naresh C. Mathur
Naresh C. Mathur has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 8980804Abstract: A novel a polymer dispersant comprising an additive reaction product obtained by reacting a first monomer comprising a mixture of alkylacrylates of varying chain lengths with a second monomer comprising an olefinic carboxylic acylating agent under conditions effective for free radical polymerization of the first and second monomers to provide a base polymer comprising an acylated alkylacrylate copolymer, and wherein the base polymer is further reacted with a hydrocarbyl amine to provide an amine-functionalized polyalkylacrylate copolymer dispersant. The base polymer intermediate has a number average molecular weight between about 5,000 to about 50,000. The polyalkylacrylate copolymer dispersant has good dispersancy, low temperature properties, thickening efficiency, and antioxidancy properties. They also can improve fuel economy when used in engine lubricating compositions.Type: GrantFiled: July 28, 2006Date of Patent: March 17, 2015Assignee: Afton Chemical CorporationInventors: John T. Loper, Naresh C. Mathur, Sanjay Srinivasan
-
Patent number: 8278254Abstract: Lubricated surfaces, lubricant compositions for lubricating a surface, and methods for increasing antiwear properties in lubricants. The lubricated surface is provided by a lubricant composition including a base oil of lubricating viscosity, at least one metal salt of phosphorothioic acid, and an amount of at least one hydrocarbon soluble titanium compound effective to provide an increase in antiwear properties of the lubricant composition. A ratio of titanium metal to phosphorus in the antiwear agent ranges from about 0.3:1 to about 1.5:1.Type: GrantFiled: September 10, 2007Date of Patent: October 2, 2012Assignee: Afton Chemical CorporationInventors: Mark T. Devlin, Kenneth J. Garelick, Naresh C. Mathur, Jeffrey M. Guevremont
-
Patent number: 8008237Abstract: A method for making a titanium-containing lubricant additive, a lubricant additive concentrate made by the method and a lubricating composition containing the additive concentrate. The method includes reacting titanium alkoxide with water in a reaction medium that includes a dispersant to provide a homogeneous titanium-containing additive product. The additive product made by the method is substantially devoid of acidic components.Type: GrantFiled: June 18, 2008Date of Patent: August 30, 2011Assignee: Afton Chemical CorporationInventors: Naresh C Mathur, Jeffrey M Guevremont
-
Patent number: 7897552Abstract: A lubricating oil composition, additive concentrate, method of lubricating moving parts, a method of improving the oxidation stability of a lubricant formulation. The lubricating oil composition includes a base oil, a hydrocarbon soluble molybdenum compound, and an antioxidant effective amount of one or more polymeric compounds devoid of ester linkages. The polymeric compound may be represented by of the formula: wherein R and R1 are independently selected from C1 to C12 hydrocarbyl groups, n is an integer ranging from about 0 to about 10; and A is a hydrocarbyl group having from about 1 to about 30 carbon atoms.Type: GrantFiled: November 30, 2007Date of Patent: March 1, 2011Assignee: Afton Chemical CorporationInventors: JoRuetta R. Ellington, John T. Loper, Naresh C. Mathur
-
Publication number: 20100292113Abstract: The embodiments described herein relate to particular formulations and methods that may provide improved fuel economy characteristics for an engine lubricant. The compositions and methods include a (a) a base oil; (b) a zinc dialkyldithiophosphate compound; and (c) a hydrocarbon soluble metal compound. The hydrocarbon soluble metal compound is devoid of phosphorus and sulfur atoms and the metal is selected from the group consisting essentially of selected from the group consisting essentially of cobalt, nickel, zinc, zirconium, manganese, vanadium, scandium, yttrium, tungsten, gold, platinum, and iron. A weight ratio of total metal in the lubricant composition from the zinc dialkyl-dithiophosphate compound and the hydrocarbon soluble metal compound to phosphorus in the lubricant composition ranges from greater than about 1.5 to 1 to about 15 to 1.Type: ApplicationFiled: March 16, 2010Publication date: November 18, 2010Applicant: AFTON CHEMICAL CORPORATIONInventors: Jeffrey M. GUEVREMONT, Mark T. DEVLIN, Naresh C. MATHUR, Jason A. LAGONA
-
Patent number: 7696138Abstract: A novel reaction product and method for making the reaction product. The reaction product is a copolymer obtained by reacting together i) an acylated alkylacrylate copolymer having a number average molecular weight ranging from about 5,000 to about 500,000; ii) a hydrocarbyl acylating agent having a number average molecular weight ranging from about 500 to about 5000; and iii) a compound selected from the group consisting of (a) a polyamine; (b) a polyol; and (c) an aminoalcohol to provide a functionalized polyalkylacrylate copolymer. According to the reaction, a mole ratio of component (i) to (ii) ranges from about 1:10 to about 5:1.Type: GrantFiled: June 18, 2007Date of Patent: April 13, 2010Assignee: Afton Chemical CorporationInventors: Naresh C. Mathur, John T. Loper, Akhilesh Duggal
-
Publication number: 20090325831Abstract: An additive concentrate comprising a viscosity index modifying copolymer comprising the reaction product of an acylated ethylene-olefin copolymer and a polyamine, and lubricating compositions containing the same are provided. Methods of improving boundary film resistance of a lubricating composition and modifying the viscosity of a lubricating composition are also provided.Type: ApplicationFiled: June 30, 2008Publication date: December 31, 2009Inventors: Naresh C. Mathur, Akhilesh Duggal, Mark T. Devlin
-
Publication number: 20090318318Abstract: A method for making a titanium-containing lubricant additive, a lubricant additive concentrate made by the method and a lubricating composition containing the additive concentrate. The method includes reacting titanium alkoxide with water in a reaction medium that includes a dispersant to provide a homogeneous titanium-containing additive product. The additive product made by the method is substantially devoid of acidic components.Type: ApplicationFiled: June 18, 2008Publication date: December 24, 2009Applicant: AFTON CHEMICAL CORPORATIONInventors: Naresh C. MATHUR, Jeffrey M. GUEVREMONT
-
Publication number: 20090143265Abstract: A lubricating oil composition, additive concentrate, method of lubricating moving parts, a method of improving the oxidation stability of a lubricant formulation. The lubricating oil composition includes a base oil, a hydrocarbon soluble molybdenum compound, and an antioxidant effective amount of one or more polymeric compounds devoid of ester linkages. The polymeric compound may be represented by of the formula: wherein R and R1 are independently selected from C1 to C12 hydrocarbyl groups, n is an integer ranging from about 0 to about 10; and A is a hydrocarbyl group having from about 1 to about 30 carbon atoms.Type: ApplicationFiled: November 30, 2007Publication date: June 4, 2009Inventors: JoRuetta R. Ellington, John T. Loper, Naresh C. Mathur
-
Publication number: 20090075853Abstract: A slow release liquid additive concentrate for use in an engine oil filter and a method for extending an oil drain interval for an engine. The additive concentrate has therein at least one detergent and at least one antioxidant. The additive concentrate has a tan delta of greater than about 5.Type: ApplicationFiled: September 18, 2007Publication date: March 19, 2009Inventors: Naresh C. Mathur, Charles A. Passut, Carl K. Esche, JR.
-
Publication number: 20090069205Abstract: Lubricated surfaces, lubricant compositions for lubricating a surface, and methods for increasing antiwear properties in lubricants. The lubricated surface is provided by a lubricant composition including a base oil of lubricating viscosity, at least one metal salt of phosphorothioic acid, and an amount of at least one hydrocarbon soluble titanium compound effective to provide an increase in antiwear properties of the lubricant composition. A ratio of titanium metal to phosphorus in the antiwear agent ranges from about 0.3:1 to about 1.5:1.Type: ApplicationFiled: September 10, 2007Publication date: March 12, 2009Inventors: Mark T. DEVLIN, Kenneth J. Garelick, Naresh C. Mathur, Jeffrey M. Guevremont
-
Publication number: 20080287328Abstract: There is disclosed a lubricant composition comprising major amount of a base oil and a minor amount of an additive composition comprising (i) a triazole compound substituted with an aryl moiety; (ii) at least one nitrogen containing compound chosen from an alkylated phenothiazine and a compound represented by the formula (I): wherein R0, R1 and R2 are each independently selected from the group consisting of an aryl moiety comprising from about 6 to about 30 carbon atoms, hydrogen, halogen, hydroxy, hydrocarbyl substituted hydrocarbyl, amino, amido, phosphoro, and sulfono, with the proviso that at least one of R0, R1 and R2 are chosen to be an aryl moiety comprising from about 6 to about 30 carbon atoms; ana (iii) a metal detergent with a soap/TBN ratio ranging from about 0.05 to about 1.5.Type: ApplicationFiled: May 16, 2007Publication date: November 20, 2008Inventors: John T. Loper, Paul G. Griffin, Naresh C. Mathur, David A. Hutchison
-
Publication number: 20080139422Abstract: There is disclosed a lubricant composition comprising major amount of a base oil and a minor amount of an additive composition comprising (i) a triazole compound substituted with an aryl moiety; (ii) a nitrogen-containing compound represented by the formula (I): wherein R1 and R2 are each independently selected from the group consisting of at least one aryl moiety comprising from about 6 to about 30 atoms, hydrogen, halogen, hydroxy, hydrocarbyl, substituted hydrocarbyl, amino, amido, phosphoro, and sulfono; and (iii) a sulfurized compound.Type: ApplicationFiled: December 6, 2006Publication date: June 12, 2008Inventors: John T. Loper, Naresh C. Mathur, Paul G. Griffin, David A. Hutchison
-
Publication number: 20080139421Abstract: There is disclosed a lubricant composition comprising a major amount of a base oil and a minor amount of an additive composition comprising (i) a triazole compound substituted with an aryl moiety; (ii) a nitrogen-containing compound represented by the formula (I): wherein R1 and R2 are each independently selected from the group consisting of at least one aryl moiety comprising from about 6 to about 30 atoms, hydrogen, halogen, hydroxy, hydrocarbyl, substituted hydrocarbyl, amino, amido, phosphoro, and sulfono; and (iii) a phenolic compound.Type: ApplicationFiled: December 6, 2006Publication date: June 12, 2008Inventors: John T. Loper, Naresh C. Mathur, Paul G. Griffin, David A. Hutchison
-
Publication number: 20080132432Abstract: Lubricated surfaces, lubricant compositions for lubricating a surface, and methods for reducing friction coefficients in lubricants. The lubricated surface is provided by a lubricant composition containing a base oil of lubricating viscosity and an amount of at least one hydrocarbon soluble zinc compound devoid of phosphorus that is effective to provide a reduction in the coefficient of friction of the lubricant composition greater than a reduction in the coefficient of friction of the lubricant composition devoid of the hydrocarbon soluble zinc compound.Type: ApplicationFiled: December 1, 2006Publication date: June 5, 2008Inventors: Naresh C. Mathur, William Y. Lam
-
Publication number: 20080090743Abstract: The present application is directed to compounds that are the reaction product of (i) a hydrocarbyl phenol, (ii) a hindered phenol; (iii) an diaryldiamine and (iv) an aldehyde. Methods of making and using the compounds of the present application are disclosed.Type: ApplicationFiled: October 17, 2006Publication date: April 17, 2008Inventor: Naresh C. Mathur
-
Publication number: 20080090742Abstract: The present application is directed to compounds that are the reaction product of (i) a polyacrylate, (ii) a hindered phenol, (iii) a diaryldiamine and optionally (iv) an alkyl amine. Methods for making these compounds and formulations employing the compounds are also disclosed.Type: ApplicationFiled: October 12, 2006Publication date: April 17, 2008Inventor: Naresh C. Mathur
-
Publication number: 20080033114Abstract: A novel a multi-functional polymer viscosity modifier comprising an additive reaction product obtained by reacting a first monomer comprising an alkylacrylate with a second monomer comprising an olefinic carboxylic acylating agent under conditions effective for free radical polymerization of the first and second monomers to provide a base polymer comprising an acylated alkylacrylate copolymer, and wherein the base polymer optionally may be further reacted with an amine compound to provide a multi-functional polyalkylacrylate copolymer. The base polymer has good thickening efficiency. The multi-functional polyalkylacrylate copolymer dispersant viscosity modifier has good thickening efficiency. The base polymer and the multi-functional polyalkylacrylate copolymer viscosity modifier have good thickening efficiency, low temperature properties, dispersancy, and antioxidancy properties. They also have no precipitation or sedimentation, nor cause or encourage such formations in finished fluids incorporating them.Type: ApplicationFiled: July 28, 2006Publication date: February 7, 2008Inventors: Sanjay Srinivasan, John T. Loper, Naresh C. Mathur, Akhilesh Duggal
-
Publication number: 20080027181Abstract: A novel a polymer dispersant comprising an additive reaction product obtained by reacting a first monomer comprising a mixture of alkylacrylates of varying chain lengths with a second monomer comprising an olefinic carboxylic acylating agent under conditions effective for free radical polymerization of the first and second monomers to provide a base polymer comprising an acylated alkylacrylate copolymer, and wherein the base polymer is further reacted with a hydrocarbyl amine to provide an amine-functionalized polyalkylacrylate copolymer dispersant. The base polymer intermediate has a number average molecular weight between about 5,000 to about 50,000. The polyalkylacrylate copolymer dispersant has good dispersancy, low temperature properties, thickening efficiency, and antioxidancy properties. They also can improve fuel economy when used in engine lubricating compositions.Type: ApplicationFiled: July 28, 2006Publication date: January 31, 2008Inventors: John T. Loper, Naresh C. Mathur, Sanjay Srinivasan
-
Publication number: 20080026972Abstract: A novel reaction product and method for making the reaction product. The reaction product is a copolymer obtained by reacting together i) an acylated alkylacrylate copolymer having a number average molecular weight ranging from about 5,000 to about 500,000; ii) a hydrocarbyl acylating agent having a number average molecular weight ranging from about 500 to about 5000; and iii) a compound selected from the group consisting of (a) a polyamine; (b) a polyol; and (c) an aminoalcohol to provide a functionalized polyalkylacrylate copolymer. According to the reaction, a mole ratio of component (i) to (ii) ranges from about 1:10 to about 5:1.Type: ApplicationFiled: June 18, 2007Publication date: January 31, 2008Inventors: Naresh C. MATHUR, John T. Loper, Akhilesh Duggal