Patents by Inventor Peter Grathwohl

Peter Grathwohl 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 and device for decontaminating waters which are loaded with organic halogen compounds (halogenated hydrocarbons)
    Patent number: 7252771
    Abstract: The invention relates to a process and a device for decontaminating waters, especially groundwaters, which are heavily and complexly polluted with organic halogen compounds (HHC), in which process the contaminated waters are pre-treated in order to convert low-volatility HHC into more readily volatile components, the halogenated hydrocarbons are subsequently transferred from the aqueous phase to the gaseous phase where complete conversion into halogen-free compounds takes place at elevated temperature by means of catalytic reductive dehalogenation.
    Type: Grant
    Filed: July 12, 2002
    Date of Patent: August 7, 2007
    Assignee: Helmholtz-Zentrum fur Umweltforschung GmbH-Ufz
    Inventors: Franz-Dieter Kopinke, Katrin MacKenzie, Robert Koehler, Holger Weiss, Peter Grathwohl, Christoph Schueth
  • Method and device for decontaminating waters which are loaded wiith organic halogen compounds (halogenated hydrocarbons)
    Publication number: 20040195189
    Abstract: The invention relates to a process and a device for decontaminating waters, especially groundwaters, which are heavily and complexly polluted with organic halogen compounds (HHC), in which process the contaminated waters are pre-treated in order to convert low-volatility HHC into more readily volatile components, the halogenated hydrocarbons are subsequently transferred from the aqueous phase to the gaseous phase where complete conversion into halogen-free compounds takes place at elevated temperature by means of catalytic reductive dehalogenation.
    Type: Application
    Filed: May 27, 2004
    Publication date: October 7, 2004
    Inventors: Frank-Dieter Kopinke, Katrin MacKenzie, Robert Koehler, Holger Weis, Peter Grathwohl, Christoph Schueth