Patents by Inventor John H. Wirag, III

John H. Wirag, III 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).

  • Treatment of zinc calcines for zinc recovery
    Patent number: 4128617
    Abstract: A process for the treatment of zinc calcine containing zinc oxides, zinc sulfates and zinc ferrites, which comprises neutral leaching, hot acid leaching, jarosite precipitation and recycling of the jarosite containing pulp whereby there is obtained increased zinc extractions, improved settling and filtering characteristics of the leach pulp, simplified operation and process control and increased ammonium removal.
    Type: Grant
    Filed: July 11, 1977
    Date of Patent: December 5, 1978
    Assignee: Newmont Exploration Limited
    Inventors: Marcel F. DeGuire, John H. Wirag, III