Patents by Inventor David I. Ossin

David I. Ossin 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).

  • Process for the treatment of platinum group metals and gold
    Patent number: 4188362
    Abstract: A process for the dissolution of precious metal values in a concentrate thereof wherein the concentrate is caused to alloy with aluminum and the alloy is then leached in at least two steps, the first of which is to remove base metals and in the second of which the precious metals are dissolved using hydrochloric acid and chlorine gas or nitric acid as an oxidant.
    Type: Grant
    Filed: June 28, 1978
    Date of Patent: February 12, 1980
    Assignee: National Institute for Metallurgy
    Inventors: Roderick I. Edwards, Joe P. Loo, David I. Ossin