Patents by Inventor David L. Death

David L. Death 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).

  • Determination of properties of coal
    Patent number: 4959549
    Abstract: Methods and apparatus for determining a property of bulk coal from a fluorescence spectrum of the coal are disclosed. In the methods the coal is illuminated so that a plurality of macerals at the surface of the coal are illuminated with UV light. Intensities of fluorescent light from the coal are determined as a function of wavelength and output signals related to the intensities are derived as a function of wavelength.
    Type: Grant
    Filed: April 17, 1989
    Date of Patent: September 25, 1990
    Assignee: Commonwealth Scientific and Industrial Research Organisation
    Inventors: John G. Haub, John E. Eberhardt, David L. Death