Patents by Inventor Philip John Giffard

Philip John Giffard 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).

  • Electrostatic separator
    Patent number: 3998727
    Abstract: An electrostatic separator unit comprises an arcuate feed plate, an arcuate screen co-axial with the feed plate, feed introduction means adapted to feed a mixture to be separated onto the feed plate for gravitational flow to the screen and an electrode above the screen. At least one of the feed plate, screen and feed introduction means is positionally adjustable rotationally about the common axis of feed plate and screen.
    Type: Grant
    Filed: August 2, 1974
    Date of Patent: December 21, 1976
    Inventor: Philip John Giffard