Patents by Inventor Larry D. Pedersen

Larry D. Pedersen 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).

  • Use of lignin/amine/surfactant blends in enhanced oil recovery
    Patent number: 5114599
    Abstract: A method for the enhanced recovery of oil comprised of injecting into an oil containing formation an aqueous surfactant system comprised of a blend of an oil soluble amine, a lignin selected from the group consisting of lignosulfonates and sulfonated alkali and soda lignins, and a water soluble anionic or non-ionic surfactant and water; driving the surfactant system through the formation and producing the oil mobilized by the surfactant system. A surfactant composition useful for enhanced oil recovery methods comprised of an oil soluble amine, a lignin, and a water soluble anionic or non-ionic surfactant.
    Type: Grant
    Filed: June 7, 1990
    Date of Patent: May 19, 1992
    Assignees: Texaco Producing Inc., Reed Lignin, Inc.
    Inventors: Francis E. Debons, Larry D. Pedersen, Lawrence E. Whittington
  • Use of lignin/amine/surfactant blends in enhanced oil recovery
    Patent number: 4822501
    Abstract: A method for the enhanced recovery of oil comprised of injecting into an oil containing formation an aqueous surfactant system comprised of a blend of an oil soluble amine, a lignin selected from the group consisting of lignosulfonates and sulfonated alkali and soda lignins, and a water soluble anionic or non-ionic surfactant and water; driving the surfactant system through the formation and producing the oil mobilized by the surfactant system. A surfactant composition useful for enhanced oil recovery methods comprised of an oil soluble amine, a lignin, and a water soluble anionic or non-ionic surfactant.
    Type: Grant
    Filed: June 5, 1987
    Date of Patent: April 18, 1989
    Inventors: Francis E. Debons, Larry D. Pedersen, Lawrence E. Whittington
  • Oxidized alkali lignins and their use in enhanced oil recovery
    Patent number: 4611659
    Abstract: A method of enhanced oil recovery comprising injecting a surfactant system comprised of an oxidized alkali lignin and an anionic and/or nonionic surfactant into a formation containing oil and producing the oil thus mobilized.
    Type: Grant
    Filed: July 2, 1984
    Date of Patent: September 16, 1986
    Assignees: Getty Oil Company, Reed Lignin, Inc.
    Inventors: Francis E. DeBons, Larry D. Pedersen, David K. Olsen, William C. Richardson
  • Method of enhanced oil recovery and compositions useful therein
    Patent number: 4548721
    Abstract: A method for the enhanced recovery of oil comprised of injecting into an oil containing formation a surfactant system comprised of an oil soluble amine modified lignin and an anionic or nonionic surfactant; driving the surfactant system through the formation and producing the oil mobilized by the surfactant system. A surfactant composition useful for enhanced oil recovery methods comprised of an oil soluble amine modified lignin and an anionic or nonionic surfactant.
    Type: Grant
    Filed: February 6, 1984
    Date of Patent: October 22, 1985
    Assignees: Getty Oil Company, Reed Lignin, Inc.
    Inventors: Francis E. DeBons, Lawrence E. Whittington, Larry D. Pedersen