Patents by Inventor Charles H. Lemke

Charles H. Lemke 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 and reactor for making magnesium metal
    Patent number: 4093194
    Abstract: Magnesium metal is made by injecting sodium metal beneath the surface of a magma of MgCl.sub.2 and withdrawing molten magnesium metal from the magma surface.
    Type: Grant
    Filed: December 28, 1976
    Date of Patent: June 6, 1978
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Norval D. Clare, Charles H. Lemke
  • Electrolytic cell
    Patent number: 4089770
    Abstract: An electrolytic cell for the electrochemical separation of selected metals from electrodissociatable compounds thereof in the molten state utilizing as electrode separator a plurality of solid electrolyte tubes which, under the influence of an electrical potential, are permeable to the flow of selected cations, but impermeable to fluids and the flow of anions and other cations.
    Type: Grant
    Filed: July 11, 1977
    Date of Patent: May 16, 1978
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Charles H. Lemke
  • Process for making magnesium metal
    Patent number: 4014687
    Abstract: Magnesium metal is made by injecting sodium metal beneath the surface of a magma of MgCl.sub.2 and withdrawing molten magnesium metal from the magma surface.
    Type: Grant
    Filed: January 13, 1976
    Date of Patent: March 29, 1977
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Norval D. Clare, Charles H. Lemke