Patents by Inventor Silvia Ebert

Silvia Ebert 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).

  • Light-scattering translucent polymethacrylate molded articles with good resistance to elevated temperature and weathering
    Patent number: 5621028
    Abstract: The invention relates to light-scattering polymethacrylate resins with high heat- and weather resistance, which resins may optionally be colored with dyestuffs or pigments. The desirable properties are achieved by addition of a combination of:particles which are light-scattering, and are crosslinked and contain phenyl groups;UV protectants; andradical scavengers.The inventive polymethacrylate molded articles are advantageously employed in illumination technology.
    Type: Grant
    Filed: March 3, 1994
    Date of Patent: April 15, 1997
    Assignee: Roehm GmbH Chemische Fabrik
    Inventors: Hans Lichtenstein, Silvia Ebert
  • Tinted plexiglass with organic pigments
    Patent number: 5387634
    Abstract: Opaque tinted acrylic glass produced with organic pigments or with organic dyes, which in addition to the colorant, also contains an acid in the polymer matrix, exhibits improved resistance to weathering.
    Type: Grant
    Filed: January 15, 1993
    Date of Patent: February 7, 1995
    Assignee: Roehm GmbH Chemische Fabrik
    Inventors: Hans Lichtenstein, Silvia Ebert, Manfred Krieg