Patents by Inventor John C. Strohkirch

John C. Strohkirch 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).

  • Lithium-iodine electrochemical cells with improved end of life characteristics
    Patent number: 5209994
    Abstract: In lithium iodine electrochemical cells, control of polyvinylpyridine film thickness and/or polyvinylpyridine film surface area coverage and/or control of the quantity thereof on or with respect to the lithium anode operative surface directly affects cell voltage characteristics during discharge, allowing the tailoring of the voltage characteristics near cell end-of-life (EOL) in a useful way.
    Type: Grant
    Filed: December 13, 1990
    Date of Patent: May 11, 1993
    Assignee: Medtronic, Inc.
    Inventors: David L. Blattenberger, William D. Helgeson, John C. Strohkirch, Bernard Heller
  • Electrochemical cell with improved fill port
    Patent number: 5173375
    Abstract: One-piece electrochemical cell cover with improved seal area in the fill port. The fill port comprises a countersunk area and an integral boss formed directly underneath the countersunk area.
    Type: Grant
    Filed: December 14, 1990
    Date of Patent: December 22, 1992
    Assignee: Medtronic, Inc.
    Inventors: John W. Cretzmeyer, John C. Strohkirch
  • Cathode material and high capacity lithium-iodine cells
    Patent number: 4340651
    Abstract: Lithium-iodine cells with cathode having more than about 97% I.sub.2 (by weight) and less than about 2.5% (by weight) poly (2-vinylpyridine) prepared in the conventional manner.
    Type: Grant
    Filed: November 12, 1980
    Date of Patent: July 20, 1982
    Assignee: Medtronic, Inc.
    Inventors: William G. Howard, John C. Strohkirch, Marilyn A. Pehl