Patents by Inventor Ulo Paabo

Ulo Paabo 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).

  • Device for purifying sewer water in small sewer systems
    Patent number: 4093551
    Abstract: A device for purifying water in small sewer systems (e.g. a system connected to one or a few family houses) includes means for automatic addition of a chemically active liquid to the water passing through the device. The invention eliminates the need of any movable parts by using two siphon tubes controlling the liquid supply. One of the siphon tubes is traversed by the sewer water and the corresponding flow generates a suction which is relied upon to transfer the chemically active liquid through the second siphon tube.
    Type: Grant
    Filed: November 29, 1976
    Date of Patent: June 6, 1978
    Assignee: IFO AB
    Inventors: Ulo Paabo, Erik Horskjar Albertsen