Patents by Inventor Dagmar Zimmermann

Dagmar Zimmermann 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).

  • Projection arrangement for a head-up display (HUD) with p-polarised radiation
    Patent number: 11914144
    Abstract: A projection arrangement for a head-up display (HUD), includes a composite pane, including an outer and an inner pane connected to one another via a thermoplastic intermediate layer, with an HUD region; an electrically conductive coating on the surface of the outer pane or of the inner pane facing or within the intermediate layer; and a projector directed toward the HUD region. The radiation of the projector is p-polarised. The composite pane has reflectance of at least 10% relative to p-polarised radiation in the spectral range from 450 nm to 650 nm. The electrically conductive coating includes at least four electrically conductive layers, which are each arranged between two dielectric layers or layer sequences. The sum of the thicknesses of all electrically conductive layers is at most 30 nm and at least one of the electrically conductive layers has a thickness of at most 5 nm.
    Type: Grant
    Filed: October 25, 2019
    Date of Patent: February 27, 2024
    Assignee: SAINT-GOBAIN GLASS FRANCE
    Inventors: Klaus Fischer, Dagmar Schaefer, Roberto Zimmermann
  • Liquid crystal mixtures
    Patent number: 7048974
    Abstract: The invention relates to TN and STN liquid-crystal displays and to the nematic liquid-crystal mixtures used therein, characterised in that they comprise one or more compounds of the formula I and one or more compounds of the formula II in which ring A, R1, R2 and Y are as defined in Claim 1.
    Type: Grant
    Filed: April 25, 2002
    Date of Patent: May 23, 2006
    Assignee: Merck Patentgesellschaft Mit Beschrankter Haftung
    Inventors: Antje Mühlfeld, Michael Junge, Harald Hirschmann, Sabine Schoen, Juliane Suermann, Ursula Patwal, Dagmar Zimmermann
  • Liquid crystal mixtures
    Publication number: 20040149956
    Abstract: The invention relates to TN and STN liquid-crystal displays and to the nematic liquid-crystal mixtures used therein, characterised in that they comprise one or more compounds of the formula I 1
    Type: Application
    Filed: November 24, 2003
    Publication date: August 5, 2004
    Inventors: Antje Mhlfeld, Michael Junge, Harald Hirschmann, Sabine Schoen, Juliane Suermann, Ursula Patwal, Dagmar Zimmermann
  • Liquid-crystalline medium
    Patent number: 6730372
    Abstract: The invention relates to a liquid-crystalline medium which is characterized in that it comprises one or more compounds of the formula A and at least one compound of the formula B in which Ra, Rb, Y, Z1, Z2, L1, L2, L3, L4, L5, L6, L7 and L8 are as defined in claim 1.
    Type: Grant
    Filed: January 28, 2003
    Date of Patent: May 4, 2004
    Assignee: Merck Patent Gesellschaft mit Beschränkter Haftung
    Inventors: Harald Hirschmann, Dagmar Zimmermann, Ursula Patwal, Antje Mühlfeld, Sabine Schoen, Martina Weidner
  • Liquid-crystalline medium
    Publication number: 20030209691
    Abstract: The invention relates to a liquid-crystalline medium which is characterized in that it comprises one or more compounds of the formula A 1
    Type: Application
    Filed: January 28, 2003
    Publication date: November 13, 2003
    Applicant: MERCK PATENTGESELLSCHAFT MIT BESCHRANKTER HAFTUNG
    Inventors: Harald Hirschmann, Dagmar Zimmermann, Ursula Patwal, Antje Muhlfeld, Sabine Schoen, Martina Weidner
  • TN and STN liquid-crystal display
    Patent number: 6028655
    Abstract: The invention relates to TN liquid-crystal displays and supertwist liquid-crystal displays (SLCDs) having very short response times and good steepnesses and angle dependences, and to the novel nematic liquid-crystal mixtures used therein, which are distinguished by the fact that they comprise at least one compound o the formula IA ##STR1## and at least one compound of the formula IB ##STR2## in which R.sup.a, R.sup.b, R.sup.c, Ring A*, L, l and r are as defined in claim 1.
    Type: Grant
    Filed: October 31, 1997
    Date of Patent: February 22, 2000
    Assignee: Merck Patent Gesellschaft Mit Beschrankter Haftung
    Inventors: Georg Weber, Harald Hirschmann, Volker Reiffenrath, Ursula Patwal, Dagmar Zimmermann