Patents by Inventor Donn L. Briskie

Donn L. Briskie 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).

  • Dynamic mixer screw tip
    Patent number: 7246936
    Abstract: The present invention includes a screw tip for an extruder screw for effecting mixing in an extruder. The screw tip has a shaft portion and at least one mixing element ring connected to the shaft portion, or a mixing element having an aperture therethrough, or both. The mixing element may have two legs connected by a top portion with the aperture between the two legs to allow flow of extrudate therethrough.
    Type: Grant
    Filed: June 4, 2004
    Date of Patent: July 24, 2007
    Assignee: Certainteed Corp.
    Inventors: Thomas A. Gates, James N. Valentine, David H. Steele, Steven H. Bowens, Donn L. Briskie