Patents by Inventor David R. Bloomfield

David R. Bloomfield 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).

  • Compacted mineral filler pellet and method for making the same
    Patent number: 5773503
    Abstract: The present invention relates to a compacted mineral filler pellet and a method of making the same. The present invention also relates to a method of making a polymeric compound which includes a compacted mineral filler pellet.
    Type: Grant
    Filed: December 11, 1996
    Date of Patent: June 30, 1998
    Assignee: Luzenac America, Inc.
    Inventors: William P. Steen, David R. Bloomfield