Patents by Inventor David G. Webster

David G. Webster 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).

  • Control device
    Patent number: 4502952
    Abstract: A control device for controlling the transfer of adsorbent to and from stages of an adsorbant-in-pulp contactor comprises a vessel for receipt of an adsorbent-pulp mixture and having an inclined screen for retention of adsorbent particles and passage of pulp, means for transferring adsorbent-pulp mixture to the vessel, means for measuring the volume of adsorbent or of adsorbent-pulp mixture in the vessel, and outlet means adjacent the lower end of the screen for recovery of drained adsorbent solids.
    Type: Grant
    Filed: June 28, 1983
    Date of Patent: March 5, 1985
    Assignee: Davy McKee (Stockton) Limited
    Inventors: David Naden, David G. Webster, Gordon Willey