Patents by Inventor Walter Teschner

Walter Teschner 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).

  • Ground- and wastewater purification
    Patent number: 5230803
    Abstract: There is disclosed a process for purifying ground- and wastewaters, which comprises subjecting said waters to a membrane separation process between a biological treatment step and adsorption on activated carbon.
    Type: Grant
    Filed: August 5, 1991
    Date of Patent: July 27, 1993
    Assignee: Ciba-Geigy Corporation
    Inventors: Markus Thuer, Thomas Strubin, Walter Teschner, Hans Horisberger