Patents by Inventor Amy E. Castle

Amy E. Castle 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).

  • Extended life die plate
    Patent number: 6193498
    Abstract: A die plate is shown suitable for extruding a viscous material into a convenient form for the preparation of small pellets or particles. The die plate includes solid support portions and perforated portions. Each perforated portion of the die plate includes a major portion of holes through the die plate spaced from each other by a first distance and a transition portion separating the major portion from the solid support portions, with the transition portions having holes spaced from each other by a distance that is greater than the first distances.
    Type: Grant
    Filed: February 26, 1999
    Date of Patent: February 27, 2001
    Assignee: Eastman Chemical Company
    Inventors: Amy E. Castle, Mark A. Thrasher, Shane K. Kirk