Patents by Inventor Sten Egil Johnsen

Sten Egil Johnsen 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 and apparatus for generating steam for the recovery of hydrocarbon
    Patent number: 9593563
    Abstract: The instant disclosure provides a method of generating steam for the recovery of hydrocarbon from a hydrocarbon producing system including (i) generating supercritical steam from water; (ii) converting the supercritical steam to a subcritical steam; and (iii) injecting the subcritical steam into the system.
    Type: Grant
    Filed: October 5, 2011
    Date of Patent: March 14, 2017
    Assignee: STATOIL PETROLEUM AS
    Inventors: Sten Egil Johnsen, Leif Kåre Grønstad, Carsten Frithjof Sørlie
  • METHOD AND APPARATUS FOR GENERATING STEAM FOR THE RECOVERY OF HYDROCARBON
    Publication number: 20140305639
    Abstract: The present invention provides a method of generating steam for the recovery of hydrocarbon from a hydro-carbon producing system comprising: (i) generating supercritical steam from water; (ii) converting said supercritical steam to a subcritical steam; and (iii) injecting said subcritical steam into said system.
    Type: Application
    Filed: October 5, 2011
    Publication date: October 16, 2014
    Applicant: STATOIL PETROLEUM AS
    Inventors: Sten Egil Johnsen, Leif Kåre Grønstad, Carsten Frithjof Sørlie
  • Use of Austenitic Stainless Steel as Construction Material in a Device or Structural Component Which is Exposed to an Oxygen and/or Hydrogen and/or Hydrofluoric Acid Environment
    Publication number: 20100133096
    Abstract: Use of an austenitic stainless steel wherein the chemical composition comprises 10-20 weight % nickel, 10-20 weight % chromium, 30-50 weight % iron, maximum 17 weight % of another element or elements and the balance iron and/or chromium and/or nickel as construction material in a device or structural components that are exposed to an oxygen and/or a hydrogen and/or a hydrofluoric acid environment.
    Type: Application
    Filed: June 27, 2007
    Publication date: June 3, 2010
    Applicant: HYDROGEN TECHNOLOGIES AS
    Inventors: Rolf Steen Hansen, Sten Egil Johnsen, Hans Jörg Fell, Egil Rasten