Patents by Inventor Donald L. Stierwalt

Donald L. Stierwalt 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).

  • Emittance calorimetric method
    Patent number: 4041313
    Abstract: A precise measurement of the absorption of weakly absorbing optical mater is measured by measuring the temperature rise of the sample when light of the wavelength of interest passes through it. The temperature rise is determined by measuring the emission from the sample due to phonon absorption processes. This emission is of a much longer wavelength than the wavelength of interest. The temperature rise is measured by measuring the rate of increase of the emitted radiation power from the sample at the longer wavelength.
    Type: Grant
    Filed: November 3, 1975
    Date of Patent: August 9, 1977
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Roy F. Potter, Donald L. Stierwalt