Patents by Inventor Harry L. Ormsby

Harry L. Ormsby 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).

  • Method of developing opaquely coated sensitized matrix with a solution containing sodium meta-silicate
    Patent number: 3998638
    Abstract: In the method of fabricating color television picture tubes, it is desirable to photo-expose and develop the exposed portions to define a phosphor matrix pattern. In such techniques an opaque coating may be deposited over the sensitized matrix coating which is to be developed. A periodate containing solution, to which is added a predetermined amount of sodium meta-silicate, is used as the developing solution to remove the sensitized matrix portions, while leaving behind the opaque light absorbing pattern on the screen substrate.
    Type: Grant
    Filed: May 22, 1975
    Date of Patent: December 21, 1976
    Assignee: Westinghouse Electric Corporation
    Inventors: Douglas A. Griswold, Harry L. Ormsby, Harold D. Wilcox