Patents by Inventor Judy A. Nagel

Judy A. Nagel 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).

  • Positive-working photoresist composition and method for forming a light-absorbing matrix in a color CRT structure
    Patent number: 4590138
    Abstract: A positive-working photoresist composition is described comprising a solution of polyvinyl alcohol, an inorganic ferric salt, ammonium trioxalatoferrate and a diol such as 1,4-butanediol. There is also described the addition of a finely divided black pigment to such a composition and the use of such a black pigmented composition for the formation of a light-absorbing matrix in a color CRT screen structure.
    Type: Grant
    Filed: May 1, 1985
    Date of Patent: May 20, 1986
    Assignee: North American Philips Consumer Electronic Corp.
    Inventors: Robert L. Lambert, Judy A. Nagel, Robert L. Bergamo
  • Positive-working photoresist composition and method for forming a light-absorbing matrix
    Patent number: 4546064
    Abstract: A positive-working photoresist composition is described comprising a solution of polyvinyl alcohol, an inorganic ferric salt, ammonium trioxalatoferrate and a diol such as 1,4-butanediol. There is also described the addition of a finely divided black pigment to such a composition and the use of such a black pigmented composition for the formation of a light-absorbing matrix in a color CRT screen structure.
    Type: Grant
    Filed: November 4, 1983
    Date of Patent: October 8, 1985
    Assignee: North American Philips Corporation
    Inventors: Robert L. Lambert, Judy A. Nagel, Robert L. Bergamo
  • Photographic process for applying phosphor pattern to color CRT shadow mask
    Patent number: 4505999
    Abstract: Phosphor characters to supply feedback information for an automatic convergence system are applied to the gun side of the shadow mask of a color cathode ray tube by a method of applying layers of a positive-working photoresist and phosphor, exposing the layers through a positive photomask, back exposing to clear the shadow mask apertures, developing to remove the exposed areas, and baking to remove the photoresist.
    Type: Grant
    Filed: September 12, 1983
    Date of Patent: March 19, 1985
    Assignee: North American Philips Consumer Electronics Corp.
    Inventors: Robert L. Bergamo, Gordon T. Foreman, Anthony V. Gallaro, Judy A. Nagel