Patents by Inventor Eva Holzel

Eva Holzel 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 forming stable images in electron beam writable glass compositions
    Patent number: 5114813
    Abstract: Silicate glasses are provided which when exposed to a silver ion exchange surface treatment are writable with electron beams. These glasses contain OD agents and do not require elements having 1-4 d-electrons in the atomic state.
    Type: Grant
    Filed: February 8, 1990
    Date of Patent: May 19, 1992
    Assignee: Schott Glass Technologies, Inc.
    Inventors: Stephen W. Smoot, Joseph S. Hayden, Marc Clement, Danuta Grabowski, Eva Holzel, Peter Nass, Martin Heming
  • Phototropic glass with a brown tint in the irradiated state
    Patent number: 4485178
    Abstract: A new phototropic glass in which the phototropic properties arise from precipitations of silver halide and which in the unirradiated condition is slightly tinted or completely colorless while showing a brown color in the light-exposed condition, comprises, in known phototropic glass compositions, an additional content of at least 0.001 wt % of TeO.sub.2 and/or Yb.sub.2 O.sub.3.
    Type: Grant
    Filed: May 31, 1983
    Date of Patent: November 27, 1984
    Assignee: Schott-Glaswerke
    Inventors: Georg Gliemeroth, Uwe Eichhorn, Eva Holzel, Ludwig Ross, Hans-Georg Krolla, Burkhard Speit, Volkmar Geiler, Hans-Jurgen Hoffmann