Patents by Inventor Claus Sonntag

Claus Sonntag 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).

  • Controlled retracting gasifying agent injection point process for UCG sites
    Patent number: 4754811
    Abstract: New controlled retracting gasifying agent injection point process for UCG sites.The process consists of a retraction of the gasifying agent injection point achieved by gradually plugging the tubing ends either by pneumatic injection of inert granulated material with a thermosetting binder, or by closing valves set at regular intervals inside the tubings.
    Type: Grant
    Filed: August 24, 1987
    Date of Patent: July 5, 1988
    Assignee: Institution pour le Developpement de la Gazeification Souterraine
    Inventors: Pierre Ledent, Claus Sonntag
  • Controlled retracting gasifying agent injection point process for UCG sites
    Patent number: 4705109
    Abstract: The process consists of a retraction of the gasifying agent injection point achieved by gradually plugging the tubing ends either by pneumatic injection of inert granulated material with a thermosetting binder, or by closing valves set at regular intervals inside the tubings.
    Type: Grant
    Filed: February 27, 1986
    Date of Patent: November 10, 1987
    Assignee: Institution pour le Developpement de la Gazeification Souterraine
    Inventors: Pierre Ledent, Claus Sonntag