Patents by Inventor Frederik M. H. J. Duysings

Frederik M. H. J. Duysings 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).

  • Orifice blockage detection system
    Patent number: 4850001
    Abstract: A method and apparatus for detecting blockage of an orifice, such as slag tap of a gasifier, by positioning at least one radiation source and detector in diametrically opposing positions outside the slag tap and out of contact with the molten slag.
    Type: Grant
    Filed: July 20, 1987
    Date of Patent: July 18, 1989
    Assignee: Shell Oil Company
    Inventors: Frederik M. H. J. Duysings, David B. Baxter, Chandler H. Barkelew
  • Mill/dryer gas temperature control
    Patent number: 4750434
    Abstract: A method and apparatus for controlling moisture content of a solid, such as pulverized coal, conveyed to a reactor, such as a gasifier, by controlling the temperature of a gas injected into a pulverizer or dryer based on the moisture content control of the coal transported to the gasifier.
    Type: Grant
    Filed: September 16, 1987
    Date of Patent: June 14, 1988
    Assignee: Shell Oil Company
    Inventors: James A. Salter, Thomas R. Schmidt, Frederik M. H. J. Duysings, Rudi Everts, David Brown, Johannes W. van der Meer