Patents by Inventor Raymond Leslie Jack

Raymond Leslie Jack 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 and extruded thermoplastic polymer
    Patent number: 6080346
    Abstract: Polyvinyl alcohol is processed into fiber or pellets for further processing, or directly into water-soluble film, in a screw-and-barrel extruder, which has a slow temperature rise and a mild kneading action achieved by a non-stick coating applied to the screw.
    Type: Grant
    Filed: January 10, 1997
    Date of Patent: June 27, 2000
    Assignee: British Technology Group Inter-Corporation LIC LIM
    Inventor: Raymond Leslie Jack