Patents by Inventor Uwe Koppe

Uwe Koppe 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).

  • Suction of gases from boreholes in coal mining
    Patent number: 4321967
    Abstract: Gas, particularly methane, is sucked from a borehole (B) extending from a coal mine working by means of a casing consisting of tubular plastics sections (8) by means of a vacuum pump connected to the lower end of the casing. The casing is sealed to the borehole by a sliding seal (2) which allows the casing to be moved up and down the borehole until the upper end of the casing is at the level of the maximum yield of gas. The annular space between the casing and borehole wall is then filled with a liquid which expands and sets to form a polyurethane foam (4).
    Type: Grant
    Filed: July 18, 1980
    Date of Patent: March 30, 1982
    Assignee: Maschinenfabrik Korfmann GmbH
    Inventors: Uwe Koppe, Walter Stegmanns, Horst Weisner