Patents by Inventor Calvin A. James

Calvin A. James 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).

  • Dispersant viscosity modifiers based on maleic anhydride-styrene copolymers
    Patent number: 8168574
    Abstract: An interpolymer composition comprising monomer-derived units of (i) at least one of an aliphatic olefin containing from 2 to 30 carbon atoms and a vinyl aromatic monomer, and (ii) at least one alpha, beta-unsaturated acylating agent; wherein a portion of said acylating agent monomers is esterified and wherein a portion of said acylating agent monomers is condensed with at least one aromatic amine, provides good viscosity modification and dispersancy performance.
    Type: Grant
    Filed: April 18, 2005
    Date of Patent: May 1, 2012
    Assignee: The Lubrizol Corporation
    Inventors: Daniel Visger, Daniel Vargo, Barton Schober, Suzanne Patterson, Patrick E Mosier, Christopher Friend, John Pudelski, Michael J Covitch, Calvin James, David Price, Leonard E Orzech
  • Dispersant Combination for Improved Transmission Fluids
    Publication number: 20100099588
    Abstract: A lubricant composition of an oil, a dispersant viscosity modifier of a poly(meth)acrylate copolymer having a nitrogen-containing monomer in an amount to provide at least about 0.4 percent by weight nitrogen to the copolymer, and a succinimide dispersant prepared in the substantial absence of chlorine gives good performance as a transmission fluid.
    Type: Application
    Filed: January 22, 2008
    Publication date: April 22, 2010
    Inventors: Calvin A. James, Craig D. Tipton, William D. Abraham, Edward J. Konzman
  • Lubricating Composition Containing a Polymer and Antiwear Agents
    Publication number: 20090312210
    Abstract: The invention provides a lubricating composition containing an oil of lubricating viscosity and polymer with pendant groups. The invention further provides for a method of controlling viscosity index by supplying to an oil of lubricating viscosity the polymer with pendant groups.
    Type: Application
    Filed: May 7, 2007
    Publication date: December 17, 2009
    Applicant: The Lubrizol Corporation
    Inventors: Bryan A. Grisso, Mark R. Baker, Daniel C. Visger, Marina Baum, Barton J. Schober, Calvin A. James
  • Dispersant Viscosity Modifiers Based on Maleic Anhydride-Styrene Copolymers
    Publication number: 20090305923
    Abstract: An interpolymer composition comprising monomer-derived units of (i) at least one of an aliphatic olefin containing from 2 to 30 carbon atoms and a vinyl aromatic monomer, and (ii) at least one alpha, beta-unsaturated acylating agent; wherein a portion of said acylating agent monomers is esterified and wherein a portion of said acylating agent monomers is condensed with at least one aromatic amine, provides good viscosity modification and dispersancy performance.
    Type: Application
    Filed: April 18, 2005
    Publication date: December 10, 2009
    Applicant: THE LUBRIZOL CORPORATION
    Inventors: Daniel C. Visger, David Price, Leonard E. Orzech, Patrick E. Mosier, Suzanne M. Patterson, Calvin A. James, Barton J. Schober, Christopher Friend, Michael J. Covitch, John K. Pudelski, Renee A. Eveland, Matthew D. Gieselman
  • Novel Polymers and Methods of Controlling Viscosity
    Publication number: 20090221461
    Abstract: The present invention relates to a novel polymer with pendant groups. The invention further provides for a lubricating composition containing said polymer. The invention further provides a method and use of controlling viscosity index by supplying to an oil of lubricating viscosity the polymer with pendant groups.
    Type: Application
    Filed: May 7, 2007
    Publication date: September 3, 2009
    Applicant: The Lubrizol Corporation
    Inventors: Daniel C. Visger, Marina Baum, Calvin A. James, Bryan A. Grisso, Mark R. Baker