Patents by Inventor Karin Mannhardt

Karin Mannhardt 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).

  • Method for improving enhanced recovery of oil using surfactant-stabilized foams
    Patent number: 5301539
    Abstract: A process is provided for enhancing the recovery of oil in a subterranean formation. The process involves injecting a surfactant-containing foam having oil-imbibing and transporting properties. A foam having such properties is selected either by determination of the lamella number or by micro-visualization techniques.
    Type: Grant
    Filed: October 29, 1991
    Date of Patent: April 12, 1994
    Assignee: Alberta Oil Sands Technology and Research Authority
    Inventors: Laurier L. Schramm, Conrad Ayasse, Karin Mannhardt, Jaromir Novosad
  • Method for improving enhanced recovery of oil using surfactant-stabilized foams
    Patent number: 5060727
    Abstract: A process is provided for enhancing the recovery of oil in a subterranean formation. The process involves injecting a surfactant-containing foam having oil-imbibing and transporting properties. A foam having such properties is selected either by determination of the lamella number or by micro-visualization techniques.
    Type: Grant
    Filed: January 2, 1990
    Date of Patent: October 29, 1991
    Assignee: Alberta Oil Sands Technology and Research Authority
    Inventors: Laurier L. Schramm, Conrad Ayasse, Karin Mannhardt, Jaromir Novosad