Patents by Inventor William P. Lorenz

William P. Lorenz 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).

  • Method of separately recovering metal values of petroleum refining catalyst
    Patent number: 4861565
    Abstract: Metal values including those of cobalt, vanadium, aluminum, molybdenum and tungsten are recovered from spent petroleum refining catalyst by acid leaching the metal values except those of molybdenum or tungsten, separating the resulting solution from the leach residue and selectively recovering the cobalt, vanadium and aluminum values from the solution and recovering the molybdenum and tungsten values from the leach residue.
    Type: Grant
    Filed: January 27, 1987
    Date of Patent: August 29, 1989
    Assignee: The Hall Chemical Company
    Inventors: Verner B. Sefton, Robert Fox, William P. Lorenz