Patents by Inventor Martina Weidner

Martina Weidner 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).

  • Liquid-crystalline medium
    Patent number: 8486298
    Abstract: The invention relates to a liquid-crystalline medium comprising one or more compounds of the formula I in which R0 and X0 have the meanings indicated in Claim 1, and to the use thereof in electro-optical liquid-crystal displays.
    Type: Grant
    Filed: August 29, 2007
    Date of Patent: July 16, 2013
    Assignee: Merck Patent GmbH
    Inventors: Harald Hirschmann, Christian Hock, Martina Weidner, Volker Reiffenrath
  • LIQUID-CRYSTALLINE MEDIUM
    Publication number: 20100026953
    Abstract: The invention relates to a liquid-crystalline medium comprising one or more compounds of the formula I in which R0 and X0 have the meanings indicated in Claim 1, and to the use thereof in electro-optical liquid-crystal displays.
    Type: Application
    Filed: August 29, 2007
    Publication date: February 4, 2010
    Inventors: Harald Hirschmann, Christian Hock, Martina Weidner, Volker Reiffenrath
  • Liquid-crystalline medium and liquid-crystal display
    Patent number: 7442419
    Abstract: Disclosed are a liquid-crystalline medium, the use thereof for electro-optical purposes, and displays containing this medium, characterised in that the medium contains one or more compounds of formula I and one or more compounds selected from compounds of formulae K-1 to K-11, containing a CF2O bridge.
    Type: Grant
    Filed: March 9, 2007
    Date of Patent: October 28, 2008
    Assignee: Merck Patent GmbH
    Inventors: Harald Hirschmann, Martina Weidner, Michael Wittek, Volker Reiffenrath, Brigitte Schuler, Markus Czanta, Renate Bender
  • Liquid-crystalline medium and liquid-crystal display
    Patent number: 7438956
    Abstract: Disclosed are liquid-crystalline medium, use thereof for electro-optical purposes, and displays containing this medium, wherein the medium contains one or more compounds of formula I and one or more compounds of formulae K-1 to K-11, containing a CF2O bridge.
    Type: Grant
    Filed: November 28, 2006
    Date of Patent: October 21, 2008
    Assignee: Merck Patent GmbH
    Inventors: Harald Hirschmann, Martina Weidner, Michael Wittek, Volker Reiffenrath, Brigitte Schuler, Markus Czanta, Renate Bender
  • LIQUID-CRYSTALLINE MEDIUM AND LIQUID-CRYSTAL DISPLAY
    Publication number: 20070228327
    Abstract: Disclosed are a liquid-crystalline medium, the use thereof for electro-optical purposes, and displays containing this medium, characterised in that the medium contains one or more compounds of formula I and one or more compounds selected from compounds of formulae K-1 to K-11, containing a CF2O bridge.
    Type: Application
    Filed: March 9, 2007
    Publication date: October 4, 2007
    Inventors: Harald Hirschmann, Martina Weidner, Michael Wittek, Volker Reiffenrath, Brigitte Schuler, Markus Czanta, Renate Bender
  • Liquid-crystalline medium and liquid-crystal display
    Publication number: 20070176146
    Abstract: Disclosed are liquid-crystalline medium, use thereof for electro-optical purposes, and displays containing this medium, wherein the medium contains one or more compounds of formula I and one or more compounds of formulae K-1 to K-11, containing a CF2O bridge.
    Type: Application
    Filed: November 28, 2006
    Publication date: August 2, 2007
    Inventors: Harald Hirschmann, Martina Weidner, Michael Wittek, Volker Reiffenrath, Brigitte Schuler, Markus Czanta, Renate Bender
  • Liquid-crystalline mixtures
    Patent number: 7052744
    Abstract: Nematic liquid-crystal mixtures comprising one or more compounds of the formula I in which R1 and R2 are as defined herein, are suitable for use in TN and STN liquid-crystal displays.
    Type: Grant
    Filed: April 7, 2004
    Date of Patent: May 30, 2006
    Assignee: Merck Patent GmbH
    Inventors: Harald Hirschmann, Sven Schuepfer, Renate Graulich, Martina Weidner, Kevin Adlem, Mark John Goulding, Patricia Saxton
  • 1,4-Di-(trans-4-cyclohexyl)benzene derivatives and their use in liquid crystal media and liquid crystal devices
    Patent number: 7041347
    Abstract: Liquid-crystalline media comprising one or more compounds of the formula I in which Ra, Rb, L and r are as defined herein, are suitable for use in, for example, TN and STN liquid crystal displays
    Type: Grant
    Filed: February 13, 2004
    Date of Patent: May 9, 2006
    Assignee: Merck Patent GmbH
    Inventors: Harald Hirschmann, Martina Weidner, Sven Schüpfer, Renate Graulich, Mark John Goulding, Martin Heeney, Warren Duffy
  • Liquid-crystalline medium
    Patent number: 6808763
    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 one more compounds of the formula B in which Ra, Rb, Rbb, x and L1 are as defined in claim 1.
    Type: Grant
    Filed: December 20, 2002
    Date of Patent: October 26, 2004
    Assignee: Merck Patent GmbH
    Inventors: Harald Hirschmann, Sven Schüpfer, Martina Weidner, Renate Graulich
  • Liquid-crystalline mixtures
    Publication number: 20040197494
    Abstract: Nematic liquid-crystal mixtures comprising one or more compounds of the formula I 1
    Type: Application
    Filed: April 7, 2004
    Publication date: October 7, 2004
    Inventors: Harald Hirschmann, Sven Schuepfer, Renate Graulich, Martina Weidner, Kevin Adlem, Mark John Goulding, Patricia Saxton
  • 1,4-Di-(trans-4-cyclohexyl)benzene derivatives and their use in liquid crystal media and liquid crystal devices
    Publication number: 20040164276
    Abstract: Liquid-crystalline media comprising one or more compounds of the formula I 1
    Type: Application
    Filed: February 13, 2004
    Publication date: August 26, 2004
    Inventors: Harald Hirschmann, Martina Weidner, Sven Schuepfer, Renate Graulich, Mark John Goulding, Martin Heeney, Warren Duffy
  • 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
  • Liquid-crystalline medium
    Publication number: 20030194511
    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: December 20, 2002
    Publication date: October 16, 2003
    Applicant: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Harald Hirschmann, Sven Schupfer, Martina Weidner, Renate Graulich
  • Liquid-crystalline medium
    Patent number: 6613401
    Abstract: Liquid-crystalline media comprising one or more compounds of formula A and at least one compound of formula B are suitable for use in TN and STN displays.
    Type: Grant
    Filed: December 6, 2001
    Date of Patent: September 2, 2003
    Assignee: Merck Patent GmbH
    Inventors: Harald Hirschmann, Sven Schüpfer, Renate Graulich, Martina Weidner
  • TN and STN liquid-crystal displays
    Patent number: 6555186
    Abstract: The invention relates to TN and STN liquid-crystal displays and to the novel nematic liquid-crystal mixtures used therein, characterized in that they comprise one or more compounds of the formula I in which R1, R2, A, u, L1 and L2 are as defined herein.
    Type: Grant
    Filed: June 19, 2001
    Date of Patent: April 29, 2003
    Assignee: Merck Patent GmbH
    Inventors: Harald Hirschmann, Martina Weidner, Sven Schupfer, Peer Kirsch
  • Liquid-crystalline medium
    Publication number: 20020119262
    Abstract: Liquid-crystalline media comprising one or more compounds of formula A 1
    Type: Application
    Filed: December 6, 2001
    Publication date: August 29, 2002
    Applicant: Merck Patent Gesellschaft mit
    Inventors: Harald Hirschmann, Sven Schupfer, Renate Graulich, Martina Weidner
  • TN and STN liquid-crystal displays
    Publication number: 20020064607
    Abstract: The invention relates to TN and STN liquid-crystal displays and to the novel nematic liquid-crystal mixtures used therein, characterized in that they comprise one or more compounds of the formula I 1
    Type: Application
    Filed: June 19, 2001
    Publication date: May 30, 2002
    Applicant: Merck Patent GmbH
    Inventors: Harald Hirschmann, Martina Weidner, Sven Schupfer, Peer Kirsch