Patents by Inventor Anton Hepfner

Anton Hepfner 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).

  • Patent number: 4428830
    Abstract: A precious metal recovery bowl includes a steep peripheral wall, a floor having an upward and inward shape at a relatively low angle, a centralized frusto-conical member having a moderately steep slope and a top central ring with a vertical outer wall terminating in a circular lip and encompassing a central, vertical, overflow channel. A tangential, horizontal nozzle extending through the peripheral wall is connected to a hose which supplies water to the bowl so as to separate a pre-screened mixture of tailings and precious metals located in the bowl.
    Type: Grant
    Filed: March 24, 1982
    Date of Patent: January 31, 1984
    Assignee: Anton Hepfner
    Inventors: Anton Hepfner, Dorothy A. Malicki