Patents by Inventor Hans Gunter Gerhard Siess

Hans Gunter Gerhard Siess 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).

  • Graphite tube for use in a flameless atomic absorption spectrometer
    Patent number: 4082460
    Abstract: An improved graphite tube for use in a flameless atomic absorption spectrometer, which is characterized by a mechanically roughened area on at least a portion of the outer peripheral surface of the graphite tube for providing substantially constant emissivity for pyrometric temperature measurement, and in a preferred form the mechanically roughened area has superimposed thereon a microscopic chemically roughened area.
    Type: Grant
    Filed: November 3, 1976
    Date of Patent: April 4, 1978
    Assignee: Bodenseewerk Perkin-Elmer & Co., GmbH
    Inventors: Klaus Joachim Braun, Hans Gunter Gerhard Siess