Patents by Inventor Erwin F. Franzen

Erwin F. Franzen 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).

  • Repair composition for steelmaking furnaces and the like
    Patent number: 4096004
    Abstract: A refractory lining repair material for steel making furnaces and the like, which consist essentially of an exothermic patching mix which may be either gunned in place or applied to furnace bottoms in the form of briquettes. Also relates to the process of furnace repair employing such mixes.
    Type: Grant
    Filed: July 19, 1976
    Date of Patent: June 20, 1978
    Inventors: Michael D. La Bate, Erwin F. Franzen