Patents by Inventor Matthew D. Graves

Matthew D. Graves 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).

  • Calcium carbonate containing kaolin clay additive
    Patent number: 4264372
    Abstract: A calcium carbonate composition contains a minor amount of kaolin clay, said kaolin clay being present in an amount sufficient to improve the dispersibility of the calcium carbonate, particularly in rubber matrices.
    Type: Grant
    Filed: October 25, 1979
    Date of Patent: April 28, 1981
    Assignee: The Georgia Marble Company
    Inventor: Matthew D. Graves