Patents by Inventor Elizabeth R. M. Luebker

Elizabeth R. M. Luebker 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).

  • Wastewater pollutant sensor
    Patent number: 5030419
    Abstract: The presence of certain chemicals on the emitting surface of the surface-derivatized photoluminescent semiconductor alters the characteristics of radiation emitted from said surface. This alteration is used to indicate the presence of those chemicals in the environment.
    Type: Grant
    Filed: June 14, 1990
    Date of Patent: July 9, 1991
    Inventors: Arthur B. Ellis, Elizabeth R. M. Luebker, Larry K. Leung, George C. Lisensky