Patents by Inventor Norbert Schwetje

Norbert Schwetje 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).

  • Sorption of organic compounds from fluids
    Patent number: 5421860
    Abstract: A method for the sorption of organic compounds using a sorbent, comprising activated carbon in a preferably amorphous oxidic support is described. Novel sorbents are also described.
    Type: Grant
    Filed: May 18, 1993
    Date of Patent: June 6, 1995
    Assignee: Engelhard Process Chemicals GmbH
    Inventors: Karl-Heinz Bretz, Kristen Fuhrmann, Michael Hoffmeister, Peter Engelmann, Andreas Meyer-Anderson, Egon Schultz, Alf-Eric Wischnat, Helmut Derleth, Norbert Schwetje
  • Process for adsorption cooling/conditioning by means of low-temperature heat
    Patent number: 5009071
    Abstract: In a process for adsorption cooling/conditioning of rooms, working media are used which comprise saturated aqueous solutions of calcium salts with an added organic polyhydroxy compound. The working media are distinguished by high salt contents and low salt precipitation temperatures at very low water vapor partial pressures and are suitable for use in continuously operated adsorption/desorption cycles of adsorption cooling/conditioning systems having high coefficients of performance.
    Type: Grant
    Filed: October 13, 1989
    Date of Patent: April 23, 1991
    Assignee: Kali-Chemie AG
    Inventors: Norbert Schwetje, Rudolf Sizmann, Noureddine Khelifa
  • Process for catalytic reduction of nitrogen oxides
    Patent number: 4950461
    Abstract: A process for catalytically reducing nitrogen oxides in an exhaust gas such as a combustion gas and a catalyst suitable for use therein. The catalyst comprises a zeolite Y which has been ion exchanged with lithium ions and/or rare earth metal ions, and may be dispersed in an amorphous oxide gel matrix.
    Type: Grant
    Filed: February 21, 1989
    Date of Patent: August 21, 1990
    Assignee: Kali-Chemie AG
    Inventors: Norbert Schwetje, Dieter Kipping
  • Process for catalytic reduction of nitrogen oxides
    Patent number: 4935393
    Abstract: A process for catalytically reducing nitrogen oxides in an exhaust gas such as a combustion gas and a catalyst suitable for use therein. The catalyst comprises a zeolite Y which has been ion exchanged with lithium ions and/or rare earth metal ions, and may be dispersed in an amorphous oxide gel matrix.
    Type: Grant
    Filed: October 5, 1987
    Date of Patent: June 19, 1990
    Assignee: Kali-Chemie AG
    Inventors: Norbert Schwetje, Dieter Kipping