Patents by Inventor Frans Evens

Frans Evens 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).

  • Apparatus for purifying polluted water
    Patent number: 3984323
    Abstract: The invention pertains to an apparatus for purifying polluted water, which comprises the combination of a screen to be immerged into the water, means for generating a water jet under said screen with respect to the water level, and means for injecting atmospheric air in said water jet.
    Type: Grant
    Filed: May 20, 1975
    Date of Patent: October 5, 1976
    Inventor: Frans Evens