Patents by Inventor Steven R. Ellebracht

Steven R. Ellebracht 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).

  • Method for determining total inorganic sulfur
    Patent number: 4238198
    Abstract: A method for the determination of sulfur by which sulfur is reduced to volatile hydrogen sulfide gas and swept into a D.C. plasma where it is detected by vacuum ultraviolet atomic emission spectrometry at 180.7 nm. The method makes possible the determination of trace levels of sulfur in samples where the matrix would normally result in spectral and/or chemical interferences.
    Type: Grant
    Filed: May 10, 1979
    Date of Patent: December 9, 1980
    Assignee: The Dow Chemical Company
    Inventors: Paul D. Swaim, Steven R. Ellebracht