Patents by Inventor Cornelis Rhonda

Cornelis Rhonda 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).

  • Aluminate phosphor with a polyphosphate coating
    Patent number: 5998047
    Abstract: A plasma display device with a phosphor screen, comprising a phosphor composition of an UV-phosphor furnished with a coating which includes one or more catena-polyphosphates of metals of the group formed by the alkaline earth metals, zinc, cadmium and manganese, can effectively be used to counteract degradation of the phosphor by UV-excitation.
    Type: Grant
    Filed: June 25, 1998
    Date of Patent: December 7, 1999
    Assignee: U.S. Philips Corporation
    Inventors: Helmut Bechtel, Wolfram Czarnojan, Walter Mayr, Thomas Justel, Hans Nikol, Cornelis Rhonda