Patents by Inventor Donald J. Dahm

Donald J. Dahm 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).

  • Spectrographic analysis instrument and method based on discontinuum theory
    Patent number: 5912730
    Abstract: In a method and apparatus for analyzing an unknown material, the spectra of absorption and remission coefficients are determined by means of equations relating to remission, absorption and transmission fractions through layers of material of different thicknesses in accordance with a discontinuum theory. To determine the concentration of an absorber in an unknown material, the absorption coefficients are determined for the unknown material and for samples of known material. The concentrations of absorbers in the unknown material are determined from the absorption coefficients by regression analysis.
    Type: Grant
    Filed: November 4, 1997
    Date of Patent: June 15, 1999
    Assignee: Foss NIRSytems, Inc.
    Inventors: Donald J. Dahm, Kevin D. Dahm