Patents by Inventor Max Dubach

Max Dubach 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).

  • Method for eliminating organic and inorganic bound nitrogen from domestic and industrial waste water
    Patent number: 4011156
    Abstract: A method of eliminating organic and inorganic bound nitrogen from domestic and industrial waste water in a biological waste water treatment plant consisting of two in series connected stages each containing an aeration tank and a subsequently connected settling basin. Waste water entering the treatment plant will be aerated in the first stage aeration tank and subsequently will be introduced for settling into the settling basin, where the overflow is removed free of oxygen and introduced into the second stage where it will be again aerated and subsequently introduced into the settling basin of the second stage.
    Type: Grant
    Filed: July 12, 1974
    Date of Patent: March 8, 1977
    Assignee: Cellulose Attisholz, AG
    Inventors: Max Dubach, Alfred Scherler