Patents by Inventor Herman J. Pieters

Herman J. Pieters 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).

  • Device for pyrometric temperature measurement
    Patent number: 4730940
    Abstract: A device for the pyrometric measurement of the temperature of a graphite tube furnace for flameless atom absorption spectroscopy is described. According to the invention, a pyroelectric detector is used as radiation receptor. The radiation flux at high temperatures is limited by a cut-off filter which starts at about .lambda..gtoreq.1 .mu.m and which, at the same time, can be constructed as radiation collector lens. It preferably consists of germanium. The detector signal is amplified in preferably three amplification stages which are connected under microprocessor control in dependence on the preselectable temperature ranges of the graphite tube furnace. A temperature measuring range from room temperature to 3,000.degree. C. is achieved.
    Type: Grant
    Filed: September 5, 1986
    Date of Patent: March 15, 1988
    Assignee: Gruen Analysengeraete GmbH
    Inventors: Robert F. M. Herber, Herman J. Pieters, Anna M. Roelofsen, Wouter van Deijck
  • Publicly accessible video teleconferencing kiosk
    Patent number: D379856
    Type: Grant
    Filed: February 12, 1996
    Date of Patent: June 10, 1997
    Assignee: Lucent Technologies Inc.
    Inventors: Thomas V. D'Alessio, Herman J. Pieters, Jack A. Pitman, II, Ian B. Quinton, Paul D. Richardson, Francis X. Schoen