Patents by Inventor Robert Crabtree

Robert Crabtree 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).

  • Inert ceramic catalyst bed supports
    Patent number: 4968651
    Abstract: Catalyst bed supports having improved performance characteristics are prepared from a mixture of a clay and a feldspathic sand.
    Type: Grant
    Filed: July 12, 1989
    Date of Patent: November 6, 1990
    Assignee: Norton Company
    Inventor: Robert Crabtree