Patents by Inventor Gunther W. B. Preiss

Gunther W. B. Preiss 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).

  • Conductivity dependent pump and process control
    Patent number: 4388043
    Abstract: Device for activating or inactivating a liquid pump on the basis of the electrical conductivity of a liquid. Device comprises, in combination, a housing having a passageway through which a liquid can flow, a pair of conductivity-sensing electrodes disposed near or in the passageway, means for connecting the passageway to a liquid pump, and means for connecting the electrodes to a conductivity-dependent pump activator connected to the pump. Device provides through-the-probe pumping and is adaptable for manual operation or in-line liquid control.
    Type: Grant
    Filed: December 21, 1981
    Date of Patent: June 14, 1983
    Assignee: Trevex Corporation
    Inventor: Gunther W. B. Preiss