Patents by Inventor William J. Dunford

William J. Dunford 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).

  • Patent number: 4606928
    Abstract: An electrostatic fluidized bed coating method, apparatus and system utilize a vortex effect within the particle cloud to produce coatings of exceptional uniformity upon a workpiece. The vortex effect produces a secondary particle cloud and a secondary electrostatic field, which contribute to the uniformity of the deposit, and the amount of metal structure included in the unit may be minimized, also to enhance uniformity. Operation can be carried out at voltages that are significantly reduced from those required for similar systems known in the art.
    Type: Grant
    Filed: March 7, 1985
    Date of Patent: August 19, 1986
    Assignee: Electrostatic Technology Incorporated
    Inventors: William J. Dunford, Bedrich Hajek