Patents by Inventor Robert Lichtenheldt

Robert Lichtenheldt 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).

  • Patent number: 12644862
    Abstract: A measuring arrangement for determining the electrical conductivity of a measuring fluid comprises a gradiometer including an excitation coil and a first and a second receiver coil. The first and second receiver coils and the measuring fluid are inductively coupled to the excitation coil. The measuring arrangement includes a measuring circuit for exciting the excitation coil, for detecting an electrical signal from the receiver coils, and for deriving the electrical conductivity of the measuring fluid from the signal. All coils consist of a conductive material that has a resistance temperature coefficient which at 20° C. is less than 3.93*10?3 K?1.
    Type: Grant
    Filed: August 27, 2024
    Date of Patent: June 2, 2026
    Assignee: Endress+Hauser Conducta GmbH+Co. KG
    Inventors: Sebastian Geissler, Robert Lichtenheldt, Ronny Michael
  • Publication number: 20250076251
    Abstract: A measuring arrangement for determining the electrical conductivity of a measuring fluid comprises a gradiometer including an excitation coil and a first and a second receiver coil. The first and second receiver coils and the measuring fluid are inductively coupled to the excitation coil. The measuring arrangement includes a measuring circuit for exciting the excitation coil, for detecting an electrical signal from the receiver coils, and for deriving the electrical conductivity of the measuring fluid from the signal. All coils consist of a conductive material that has a resistance temperature coefficient which at 20° C. is less than 3.93*10?3 K?1.
    Type: Application
    Filed: August 27, 2024
    Publication date: March 6, 2025
    Inventors: Sebastian Geissler, Robert Lichtenheldt, Ronny Michael