Patents by Inventor Herbert P. Sien

Herbert P. Sien 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).

  • Coker feedstock analysis method
    Patent number: 4388408
    Abstract: A clarified slurry oil coker feedstock is subjected to absorption chromatography and ultraviolet light adsorptivity and the results are correlated to determine the suitability of the feedstock for electrode grade coke.
    Type: Grant
    Filed: December 22, 1980
    Date of Patent: June 14, 1983
    Assignee: Suntech, Inc.
    Inventors: Herbert P. Sien, Thomas J. McGinley