Patents by Inventor Alexander Duhr

Alexander Duhr 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 the analysis of isotope ratios
    Patent number: 8402814
    Abstract: A method for the analysis of isotope ratios, wherein at least one sample gas and/or at least one reference gas are supplied to at least one analytical device via at least one open split, the addition of a carrier gas also being possible. According to the invention, the concentration of the sample gas and/or reference gas passing into the analytical device is controlled by the supply of the respective carrier gas or by direct supply of the sample gas into the analytical device. In the device according to the invention for supplying gases to at least one analytical device, two or more capillaries are provided for sample gases, the capillaries in each case having their own drive for the movement between mixing zone and waiting zone.
    Type: Grant
    Filed: March 26, 2007
    Date of Patent: March 26, 2013
    Assignee: Thermo Fischer Scientific (Bremen) GmbH
    Inventors: Deike Hatscher, Andreas Hilkert, Hans-Jürgen Schlüter, Alexander Duhr, Michael Krummen, Johannes Schwieters
  • Device for the analysis of isotope ratios
    Patent number: 7928369
    Abstract: A method for the analysis of isotope ratios, wherein at least one sample gas and/or at least one reference gas are supplied to at least one analytical device via at least one open split, the addition of a carrier gas also being possible. According to the invention, the concentration of the sample gas and/or reference gas passing into the analytical device is controlled by the supply of the respective carrier gas or by direct supply of the sample gas into the analytical device. In the device according to the invention for supplying gases to at least one analytical device, two or more capillaries are provided for sample gases, the capillaries in each case having their own drive for the movement between mixing zone and waiting zone.
    Type: Grant
    Filed: September 30, 2008
    Date of Patent: April 19, 2011
    Assignee: Thermo Fisher Scientific (Bremen) GmbH
    Inventors: Deike Hatscher, Andreas Hilkert, Hans-Jurgen Schluter, Alexander Duhr, Michael Krummen, Johannes Schwieters
  • METHOD AND DEVICE FOR THE ANALYSIS OF ISOTOPE RATIOS
    Publication number: 20090314057
    Abstract: A method for the analysis of isotope ratios, wherein at least one sample gas and/or at least one reference gas are supplied to at least one analytical device via at least one open split, the addition of a carrier gas also being possible. According to the invention, the concentration of the sample gas and/or reference gas passing into the analytical device is controlled by the supply of the respective carrier gas or by direct supply of the sample gas into the analytical device. In the device according to the invention for supplying gases to at least one analytical device, two or more capillaries are provided for sample gases, the capillaries in each case having their own drive for the movement between mixing zone and waiting zone.
    Type: Application
    Filed: March 26, 2007
    Publication date: December 24, 2009
    Inventors: Deike Hatscher, Deike Hatscher, Andreas Hilkert, Hans-Jürgen Schlüter, Alexander Duhr, Michael Krummen, Johannes Schwieters
  • DEVICE FOR THE ANALYSIS OF ISOTOPE RATIOS
    Publication number: 20090159795
    Abstract: A method for the analysis of isotope ratios, wherein at least one sample gas and/or at least one reference gas are supplied to at least one analytical device via at least one open split, the addition of a carrier gas also being possible. According to the invention, the concentration of the sample gas and/or reference gas passing into the analytical device is controlled by the supply of the respective carrier gas or by direct supply of the sample gas into the analytical device. In the device according to the invention for supplying gases to at least one analytical device, two or more capillaries are provided for sample gases, the capillaries in each case having their own drive for the movement between mixing zone and waiting zone.
    Type: Application
    Filed: September 30, 2008
    Publication date: June 25, 2009
    Inventors: Deike HATSCHER, Andreas Hilkert, Hans-Jurgen Schluter, Alexander Duhr, Michael Krummen, Johannes Schwieters