Patents by Inventor B. Donald Prazmowski

B. Donald Prazmowski 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).

  • Biofilter
    Patent number: 5609753
    Abstract: A biofilter has a plurality of filter elements each of which has a filter medium of fragmented plastic, preferably waste plastic. The fragmented plastic has an inherent curvature to maintain adjacent surfaces of the fragment plastic in spaced relationship. The filter elements are arranged in filter modules in series with the effluent flow with the longitudinal axes of filter elements of adjacent filter modules disposed orthogonally.
    Type: Grant
    Filed: September 26, 1995
    Date of Patent: March 11, 1997
    Inventor: B. Donald Prazmowski