Patents by Inventor Franz Josef Steffens

Franz Josef Steffens 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).

  • Method for measuring the concentration of a dissolved gas in a fluid
    Patent number: 6192737
    Abstract: The invention pertains to a method for measuring the concentration of dissolved gases in a liquid [(39)], especially of CO2 in beverages, in which the liquid [(39)] is passed across the retentate side [(140)] of a membrane [(14)] that is at least partially permeable to the dissolved gas, and [in which] the volumetric flow of the permeated gas on permeate side [(16)] of the membrane [(14)] is determined, the temperature of the liquid [(39)] is measured, and the concentration of the dissolved gas in the liquid [(39)] is calculated from these values. In this, the thickness of the membrane [(14)] can be pre-selected as a function of the flow rate of the liquid [(39)] flowing along the retentate side [(140)].
    Type: Grant
    Filed: November 20, 1998
    Date of Patent: February 27, 2001
    Assignees: Rosemount Analytical Inc., GKSS-Forschungszentrum Geesthacht GmbH
    Inventors: Klaus Ohlrogge, Carsten Hasler, Jan Wind, Dieter Cegla, Franz Josef Steffens