Patents by Inventor Edith G. Hays

Edith G. Hays 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).

  • High optical density ultra thin organic black matrix system
    Patent number: 5998090
    Abstract: A high optical density, i.e., .gtoreq.3.0, at 1 micron or less film thickness, black matrix is disclosed having improved stability and shelf life as a consequence of admixing Pigment Black 7 and organic dye or dye mixtures on a polyimide polymer vehicle.
    Type: Grant
    Filed: December 1, 1997
    Date of Patent: December 7, 1999
    Assignees: Brewer Science, Inc., Nissan Chemical Industries, Ltd.
    Inventors: Ram W. Sabnis, Terry L. Brewer, Robert E. Nichols, Edith G. Hays, Michael D. Stroder, Akira Yanagimoto, Yasuhisa Sone, Yoshitane Watanabe, Kiyomi Ema
  • Ultra thin photolithographically imageable organic black matrix coating material
    Patent number: 5780201
    Abstract: An organic black matrix having high resistivity (.gtoreq.10.sup.11 ohm/square), high optical density (.gtoreq.2.0) at ultra thin film thicknesses (.ltoreq.1.0 microns) for improved STN and TFT pixel display applications is made possible by combining polyimide/dye solutions and mixed metal oxide pigment dispersions at a weight/weight ratio of dye to pigment of 1:15 to 3:15. The need for low resistivity carbon black, as a replacement for sputtered chrome, is negated.
    Type: Grant
    Filed: September 27, 1996
    Date of Patent: July 14, 1998
    Assignees: Brewer Science, Inc., Nissan Chemical Industries, Ltd.
    Inventors: Ram W. Sabnis, Jonathan W. Mayo, Edith G. Hays, Terry L. Brewer, Michael D. Stroder, Akira Yanagimoto, Yasuhisa Sone, Yoshitane Watanabe, Kiyomi Ema