Patents by Inventor Philip M. Gardiner

Philip M. Gardiner 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).

  • Cupel
    Patent number: 4372543
    Abstract: A cupel for the fire assaying of ore samples is provided having an improved configuration comprising a primary hemispherical cavity within which is disposed a secondary hemispherical cavity. The secondary cavity has a radius of curvature no greater than one half that of the primary cavity, and extends in a downward direction beyond the lowest extreme of the primary cavity. A transverse lip serves as an upper ridge for the secondary cavity.
    Type: Grant
    Filed: May 14, 1981
    Date of Patent: February 8, 1983
    Inventor: Philip M. Gardiner