Patents by Inventor Charles Henry Knepfler

Charles Henry Knepfler 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).

  • Filming process for electrophotographic screen (EPS) formation
    Patent number: 6444380
    Abstract: A method of manufacturing a luminescent screen assembly for a color cathode-ray tube (CRT) is disclosed. The luminescent screen assembly is formed on an interior surface of a faceplate panel of the CRT. The luminescent screen assembly includes color-emitting phosphors that are sequentially deposited over portions of the interior surface of the faceplate panel of the CRT. A filming composition is electrostatically sprayed over the color-emitting phosphors. The filming composition comprises an acrylic polymer dissolved in a solvent mixture of one or more high-volatility solvents combined with one or more low-volatility solvents.
    Type: Grant
    Filed: January 16, 2001
    Date of Patent: September 3, 2002
    Assignee: Thomson Licensing S. A.
    Inventors: Himanshu Mukundray Patel, Jeffrey Herbert Harrell, Charles Henry Knepfler
  • FILMING PROCESS FOR ELECTROPHOTOGRAPHIC SCREEN (EPS) FORMATION
    Publication number: 20020094486
    Abstract: A method of manufacturing a luminescent screen assembly for a color cathode-ray tube (CRT) is disclosed. The luminescent screen assembly is formed on an interior surface of a faceplate panel of the CRT. The luminescent screen assembly includes color-emitting phosphors that are sequentially deposited over portions of the interior surface of the faceplate panel of the CRT. A filming composition is electrostatically sprayed over the color-emitting phosphors. The filming composition comprises an acrylic polymer dissolved in a solvent mixture of one or more high-volatility solvents combined with one or more low-volatility solvents.
    Type: Application
    Filed: January 16, 2001
    Publication date: July 18, 2002
    Inventors: Himanshu Mukundray Patel, Jeffrey Herbert Harrell, Charles Henry Knepfler