Patents by Inventor Jack Willocks

Jack Willocks 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).

  • Extrusion apparatus and method for extruding abrasive pastes
    Patent number: 4212840
    Abstract: This invention concerns an improved apparatus for extruding abrasive pastes, especially those which contain ground glass together with polymerizable material, and which comprises a conventional piston and cylinder extrusion apparatus in which the working surfaces are protected by a replaceable lining system consisting of a thin tubular liner and two discs substantially closing its ends and enclosing the paste to be extruded. In the preferred embodiment (FIG. 1) the lining system is made of polypropylene.
    Type: Grant
    Filed: September 8, 1978
    Date of Patent: July 15, 1980
    Assignee: Imperical Chemical Industries Limited
    Inventors: George S. Cliff, Jack Willocks