Patents by Inventor Robert E. Union

Robert E. Union 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: 7582136
    Abstract: A process for the recovery of gold from a potassium iodide-iodine solution is provided. The gold is precipitated from the solution using a weak acid, (e.g. ascorbic acid), a buffer, (e.g. sodium bicarbonate), and a dye. The precipitate is then removed from the solution resulting in the recovery the gold precipitate and the potassium iodide-iodine solution.
    Type: Grant
    Filed: March 28, 2007
    Date of Patent: September 1, 2009
    Assignee: Union Etchants International, Inc.
    Inventor: Robert E. Union