Patents by Inventor Werner Fahle

Werner Fahle 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).

  • Filter for holding and raising ground water
    Patent number: 6372135
    Abstract: The invention relates to a filter in which dust-containing silica sand is held together by a polyurethane binder, the polyurethane binder containing an organotin compound with a molecular weight of more than 600 as catalyst and a mixture of highly dispersed silica and/or bentonites with a thickened aluminosilicate as modifier. The filter is particularly suitable for the production of drinking water from ground water in surface mining regions.
    Type: Grant
    Filed: November 6, 1997
    Date of Patent: April 16, 2002
    Assignees: Henkel Kommanditgesellschaft auf Aktien, Lausitzer Braunkohle
    Inventors: Hans-Peter Kohlstadt, Klaus Marten, Lothar Thiele, Werner Fahle, Rainer Tost, Annebärbel Tost, Peter Tost, Frank Tost