Patents by Inventor Irmgard Westenberger

Irmgard Westenberger 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).

  • Glass element with high scratch tolerance
    Patent number: 9371248
    Abstract: A glass element is provided that is made of a glass having SiO2, Al2O3, B2O3, and Na2O. The glass has a scratch tolerance that when scratches of 1 mm length are introduced using a Knoop diamond indenter which presses upon a surface of the glass with a force of 4 Newton and is displaced along the surface with a traverse speed of 0.4 mm/s, not more than 20% of the scratches have a noticeable width including visible chipping of more than 25 ?m. In some embodiments, the glass, after chemical tempering, has sodium ions that are at least partially exchanged for potassium ions so that a compressive stress zone is provided at the surface of the glass. The compressive stress is at least 700 MPa and an exchange depth of alkali ions is at least 25 ?m.
    Type: Grant
    Filed: April 10, 2014
    Date of Patent: June 21, 2016
    Assignee: SCHOTT AG
    Inventors: Oliver Hochrein, Inge Burger, Irmgard Westenberger, Jochen Alkemper, Gerd Rudas, Katharina Alt, Gordon Kissl, Gunther Paulus
  • GLASS ELEMENT WITH HIGH SCRATCH TOLERANCE
    Publication number: 20140309097
    Abstract: A glass element is provided that is made of a glass having SiO2, Al2O3, B2O3, and Na2O. The glass has a scratch tolerance that when scratches of 1 mm length are introduced using a Knoop diamond indenter which presses upon a surface of the glass with a force of 4 Newton and is displaced along the surface with a traverse speed of 0.4 mm/s, not more than 20% of the scratches have a noticeable width including visible chipping of more than 25 ?m. In some embodiments, the glass, after chemical tempering, has sodium ions that are at least partially exchanged for potassium ions so that a compressive stress zone is provided at the surface of the glass. The compressive stress is at least 700 MPa and an exchange depth of alkali ions is at least 25 ?m.
    Type: Application
    Filed: April 10, 2014
    Publication date: October 16, 2014
    Applicant: Schott AG
    Inventors: Oliver Hochrein, Inge Burger, Irmgard Westenberger, Jochen Alkemper, Gerd Rudas, Katharina Alt, Gordon Kissl, Gunther Paulus
  • CHEMICALLY TEMPERABLE GLASS ELEMENT WITH HIGH SCRATCH TOLERANCE AND METHODS FOR PRODUCING THE GLASS ELEMENT
    Publication number: 20140308525
    Abstract: A glass and a glass composition are provided that, following chemical tempering, not only exhibit high values of compressive stress and depth of ion exchange, but also excellent scratch tolerance. The glass composition includes SiO2, Al2O3, B2O3, ZrO2, and Na2O.
    Type: Application
    Filed: April 10, 2014
    Publication date: October 16, 2014
    Applicant: Schott AG
    Inventors: Oliver Hochrein, Inge Burger, Irmgard Westenberger, Jochen Alkemper, Gerd Rudas, Katharina Alt, Gordon Kissl, Gunther Paulus
  • SUBSTRATE WITH A SOL-GEL LAYER AND METHOD FOR PRODUCING A COMPOSITE MATERIAL
    Publication number: 20110111203
    Abstract: A substrate with a sol-gel layer and to a method for producing a composite material wherein a barrier layer is placed between the sol-gel layer and the substrate are provided.
    Type: Application
    Filed: December 5, 2008
    Publication date: May 12, 2011
    Inventors: Gabriele Roemer-Scheuermann, Gerhard Weber, Joerg Schuhmacher, Stefan Bauer, Harry Engelmann, Marta Krzyzak, Irmgard Westenberger, Peter Zachmann