Patents by Inventor Kathryn S. Jones

Kathryn S. Jones 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: 6062719
    Abstract: A corotating multiple-screw extruder comprising first and second intermeshing screws of more than one flight. The first screw comprises first and second segments paired with first and second segments of the second screw, respectively. On the first segment of the first screw, the height of the first flight is less than the height of the second flight and on the second segment of the second screw, the height of the first flight is less than the height of the second flight and screws for use in such extruder.
    Type: Grant
    Filed: November 19, 1997
    Date of Patent: May 16, 2000
    Assignee: The Dow Chemical Company
    Inventors: Forest Busby, Ray A. Herring, Richard O. Kirk, Kathryn S. Jones
  • Patent number: 6022133
    Abstract: A multiple-screw extruder in which paired co-rating screws, or segments thereof, contain unequal numbers of flights; and a screw for use in such extruder.
    Type: Grant
    Filed: September 23, 1997
    Date of Patent: February 8, 2000
    Assignee: The Dow Chemical Company
    Inventors: Ray A. Herring, Richard O. Kirk, Forest Busby, Kathryn S. Jones