Patents by Inventor Jorg Kelleter

Jorg Kelleter 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).

  • Apparatus for measuring a state variable in a gas with at least one semiconductive gas sensor
    Patent number: 5668304
    Abstract: To eliminate the effects of semiconductive sensor aging in the use of a semiconductive sensor for measuring the state variables of a gas in a system in which a pair of electrodes are embedded in an active semiconductive layer so that the conductivity of the semiconductive layer varies as a function of the state variable, a field electrode is provided and superimposed upon the measurement voltage, a voltage pulse is applied intermittently and the characteristic of the resulting current pulse is used to compensate for changes resulting from aging of the sensor.
    Type: Grant
    Filed: November 6, 1996
    Date of Patent: September 16, 1997
    Assignee: RWE Energie Aktiengesellschaft
    Inventors: Jorg Kelleter, Claus-Dieter Kohl, Heinz Petig