Patents by Inventor Jeffrey R. Dykstra

Jeffrey R. Dykstra 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).

  • Microwave excited photoacoustic effect carbon monitor
    Patent number: 5540079
    Abstract: A method and apparatus for directing modulated microwave radiation at fly ash which absorbs the microwave energy and, in turn, emits minute acoustical waves. Those acoustic waves are measured by a microphone to determine the carbon content of the fly ash.
    Type: Grant
    Filed: August 30, 1994
    Date of Patent: July 30, 1996
    Assignee: Iowa State University Research Foundation, Inc.
    Inventors: Robert C. Brown, Jeffrey R. Dykstra