Patents by Inventor Derek L. Hook

Derek L. Hook 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).

  • Removal of fly ash from the surface of liquids
    Patent number: 4363735
    Abstract: A method of removing a part of a stratum of fly ash comprising particles of relatively fine mean dimensions from the surface of a pond comprising submerging the leading edge of a scoop having a grid structure below the layer of fly ash, driving the scoop forwardly so that ash enters the scoop, lifting the scoop above the pond so that it drains of liquid and then tipping the drained ash from the scoop to a suitable location.
    Type: Grant
    Filed: April 30, 1981
    Date of Patent: December 14, 1982
    Inventor: Derek L. Hook