Patents by Inventor Martin KOENITZER

Martin KOENITZER 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 of removing Cr(VI) ions from an aqueous electrolyte solution
    Patent number: 11389887
    Abstract: The invention relates to a method for removing Cr(VI) ions from an aqueous electrolyte solution, particularly an electrolyte solution for electrochemical metal machining, which comprises the reduction of Cr(VI) to Cr(III) with Fe(II) ions. The Fe(II) ions are added to the electrolyte solution in the form of an aqueous salt solution which has been brought into contact with an ion exchange resin loaded with Fe(II) ions. The invention further relates to a device (1) for electrochemical machining of a workpiece (2) by means of an aqueous electrolyte solution (6), which has an ion exchanger (11) which has been loaded with an ion exchange resin charged with Fe(II) ions.
    Type: Grant
    Filed: January 22, 2020
    Date of Patent: July 19, 2022
    Assignee: MTU AERO ENGINES AG
    Inventors: Nicole Feiling, Max Niegl, Martin Koenitzer, Norbert Rast, Rudolf Hill, Dieter Mauer
  • METHOD OF REMOVING Cr(VI) IONS FROM AN AQUEOUS ELECTROLYTE SOLUTION
    Publication number: 20200238411
    Abstract: The invention relates to a method for removing Cr(VI) ions from an aqueous electrolyte solution, particularly an electrolyte solution for electrochemical metal machining, which comprises the reduction of Cr(VI) to Cr(III) with Fe(II) ions. The Fe(II) ions are added to the electrolyte solution in the form of an aqueous salt solution which has been brought into contact with an ion exchange resin loaded with Fe(II) ions. The invention further relates to a device (1) for electrochemical machining of a workpiece (2) by means of an aqueous electrolyte solution (6), which has an ion exchanger (11) which has been loaded with an ion exchange resin charged with Fe(II) ions.
    Type: Application
    Filed: January 22, 2020
    Publication date: July 30, 2020
    Inventors: Nicole FEILING, Max NIEGL, Martin KOENITZER, Norbert RAST, Rudolf HILL, Dieter MAUER