Patents by Inventor Knud Gerdes

Knud Gerdes 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).

  • Process for strengthening and sealing geological formations
    Patent number: 4761099
    Abstract: The present invention is directed to a process for strengthening and sealing geological formations which are moist or contain water, in particular loose stone, by the injection of a mixture which reacts to form polyurethane, characterized in that a polyisocyanate component is injected before injection of the reaction mixture.
    Type: Grant
    Filed: March 27, 1987
    Date of Patent: August 2, 1988
    Assignees: Bayer Aktiengesellschaft, Bergwerksverband GmbH
    Inventors: Max Mann, Manfred Kapps, Frank Meyer, Hans Mehesch, Wolfgang Cornely, Bernhard Maidl, Dietrich Stein, Knud Gerdes