Patents by Inventor Frank-Hasse Schmidt

Frank-Hasse Schmidt 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).

  • Scraper chain conveyor for use in underground mining
    Publication number: 20040140178
    Abstract: A drag chain conveyor is provided for use in underground mining, and comprises interconnected, profiled conveyor chutes, conveyor chains guided in the conveyor chutes, carriers attached to the conveyor chains, and at least one drive for the conveyor chains. The conveyor chains and/or the carriers are comprised at least partially of a self-extinguishing and difficult to ignite plastic or polymeric material having anti-static material properties and a high mechanical strength.
    Type: Application
    Filed: October 22, 2003
    Publication date: July 22, 2004
    Inventors: Elmar Wiejack-Symann, Frank-Hasse Schmidt