Patents by Inventor Helmut Riegel

Helmut Riegel 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 for the operation of an Otto engine
    Patent number: 4955331
    Abstract: A method for reducing the consumption of fuel and emission of toxic exhaust gas and reducing engine wear of an Otto engine, equipped with an exhaust gas catalyst system for secondary combustion of exhaust gas, in which a liquid non-leaded fuel containing 1 to 100 ppm by weight of ferrocene is used.
    Type: Grant
    Filed: January 23, 1989
    Date of Patent: September 11, 1990
    Assignee: Vebe Oel Aktiengesellschaft
    Inventors: Dieter Hohr, August-Wilhelm Preuss, Kurt-Peter Schug, Helmut Riegel