Patents by Inventor James A. DeLeeuw

James A. DeLeeuw 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 and method for reducing volume of aqueous waste effluents
    Patent number: 4828717
    Abstract: The device for reducing the volume of an aqueous waste effluent includes a holding tank, a heating tank for receiving waste effluent from the holding tank and including a heater for heating the waste effluent to a predetermined temperature which is below the boiling point of water and high enough to cause a portion of the water to evaporate and be discharged as water vapors, an agitation pump for continuously recirculating the liquids contents of the heating tank and filter units mounted on top of the heating tank for separating solids and particulate matter from the resulting slurry and returning the filtrate to the heating tank.
    Type: Grant
    Filed: April 14, 1988
    Date of Patent: May 9, 1989
    Assignee: Arkay Corporation of Wisconsin
    Inventors: James A. DeLeeuw, Raymond E. Sims
  • Machine for dehydrating photographic chemicals
    Patent number: D304340
    Type: Grant
    Filed: June 8, 1987
    Date of Patent: October 31, 1989
    Assignee: Arkay Corporation
    Inventors: James A. DeLeeuw, Raymond E. Sims