Patents by Inventor Ray W. Drenner

Ray W. Drenner 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).

  • Ecological treatment system for flowing water
    Patent number: 5254252
    Abstract: The invention is a method for using periphyton to treat flowing water in a waterway. The periphyton reduces the quantity of undesirable chemicals polluting the water. Fish, in turn, control the density of periphyton by grazing on the periphyton and convert the undesirable chemicals associated with the periphyton into removable forms such as fish tissue or fish feces.
    Type: Grant
    Filed: September 29, 1992
    Date of Patent: October 19, 1993
    Inventor: Ray W. Drenner