Patents by Inventor Robert Johan Meijer

Robert Johan Meijer 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: 6057542
    Abstract: A system for determining a composition of radionuclides in, for instance, a mineral-containing material by detecting gamma and/or X-ray radiation emitted by the nuclides is disclosed. To that end, the system has a detector unit which supplies an electrical signal containing information about the intensity and energy of the emitted radiation and a signal processing system by which these electrical signals are further processed for determine the composition mentioned. The signal processing system further has an A/D converter to which the electrical signals are applied and a first computer unit which further processes signals supplied by the A/D converter for the purpose of determining the composition mentioned.
    Type: Grant
    Filed: April 23, 1998
    Date of Patent: May 2, 2000
    Assignee: Rijksuniversiteit te Groningen
    Inventors: Robert Johan Meijer, Cornelis Stapel
  • Patent number: 5744804
    Abstract: The system relates to a system for determining a composition of radionuclides in, for instance, a mineral-containing material by detecting gamma and/or X-ray radiation emitted by the nuclides. To that end, the system comprises a detector unit (2,6, 10) which supplies an electrical signal containing information about the intensity and energy of the emitted radiation and a signal processing system by which these electrical signals are further processed for determining the composition mentioned. According to the invention, the signal processing system further comprises an A/D converter (14) to which the electrical signals are applied and a first computer unit (26) which further processes signals supplied by the A/D converter for the purpose of determining the composition mentioned.
    Type: Grant
    Filed: December 2, 1996
    Date of Patent: April 28, 1998
    Assignee: Rijksuniversiteit Te Groningen
    Inventors: Robert Johan Meijer, Cornelis Stapel