Patents by Inventor Donald W. Alwood

Donald W. Alwood 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).

  • Air scrubber
    Patent number: 5292353
    Abstract: A water washed air scrubber in which the contaminated air is first directed toward the surface of a bath of water and cleaning agent at relatively high velocity to create adequate turbulence to achieve a scrubbing action to remove a majority of the contaminate, and thereafter passed through a filter to remove any remaining liquid and/or contaminate.
    Type: Grant
    Filed: July 3, 1991
    Date of Patent: March 8, 1994
    Assignees: The Delfield Company, Renco Systems, Inc.
    Inventors: Arnold S. Kaufman, Robert L. Anderson, Donald W. Alwood, James T. Otenbaker, Frederick F. Fritz