Patents by Inventor Michael R. Steffenson

Michael R. Steffenson 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).

  • Pressure and temperature reaction vessel, method, and apparatus
    Patent number: 4882128
    Abstract: A pressure and temperature reaction vessel is constructed from substantially microwave-transmissible materials. The vessel includes pressure-relief vents and a sliding seal which isolates a pressure reaction chamber from the vents. A visual indicator is operatively associated with the sliding seal to indicate pressure within the reaction chamber. At pressures above a preselected limit, the sliding seal becomes unsupported and the reaction chamber is fluidly communicated with the vents.
    Type: Grant
    Filed: July 31, 1987
    Date of Patent: November 21, 1989
    Assignee: Parr Instrument Company
    Inventors: Istvan S. Hukvari, Henry J. Albert, Vernon G. Moon, Michael R. Steffenson