Patents by Inventor Barbara M. Kapsar

Barbara M. Kapsar 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).

  • Thermoluminescent CaF.sub.2 (Tm) and method for its use
    Patent number: 4039834
    Abstract: A method is disclosed for the use of thulium doped calcium fluoride in the form of a thermoluminescent dosimeter to measure the amount of radiation to which the dosimeter has been exposed.A new thermoluminescent material for use in a dosimeter is also disclosed. The material consists essentially of crystalline calcium fluoride doped with less than 0.5 mole percent thulium. The material has several unique properties, and displays two well separated glow maxima which permit using a lower temperature (150.degree. C) peak as a thermometer to determine a mean ambient temperature for the dosimeter. The mean ambient temperature may then be used to correct thermoluminescent data for a high temperature (250.degree. C) peak.
    Type: Grant
    Filed: January 9, 1975
    Date of Patent: August 2, 1977
    Assignee: The Harshaw Chemical Company
    Inventors: Arthur C. Lucas, Robert H. Moss, Barbara M. Kapsar