Patents by Inventor Allison R Calhoun

Allison R Calhoun 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).

  • Mineral containing thermoplastic granules
    Patent number: 6323269
    Abstract: A mineral containing thermoplastic granule for incorporation in a thermoplastic material to produce a thermoplastic end product, the granule comprising at least 50% by weight of an inorganic particulate material, at least 0.1% by weight of an additive comprising a blowing agent, and the balance comprising a thermoplastic binder.
    Type: Grant
    Filed: April 24, 1998
    Date of Patent: November 27, 2001
    Assignee: Imerys Pigments, Inc.
    Inventors: David A. Skelhorn, Allison R Calhoun