Patents by Inventor Harald Hirschmann

Harald Hirschmann 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
    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 comprising 1,2-difluoroethene compounds
    Patent number: 7651742
    Abstract: The present invention relates to a liquid-crystalline medium comprising 1,2-difluoroethene compounds of the general formula I, in which R1, ring A, Z1, Z2, m, X and L1-6 are as defined in claim 1. The invention also relates to the use of the medium for electro-optical purposes and to displays containing this medium. Novel 1,2-difluoroethene compounds having 3 or more rings are disclosed.
    Type: Grant
    Filed: May 18, 2006
    Date of Patent: January 26, 2010
    Assignee: Merck Patent GmbH
    Inventors: Michael Wittek, Markus Czanta, Harald Hirschmann, Volker Reiffenrath
  • Liquid Crystalline Medium
    Publication number: 20090230354
    Abstract: The invention relates to a liquid crystalline medium containing one or more compounds of formula I, wherein R1 and R2 have the meanings described in claim 1, to its use for electrooptical purposes, and to displays containing this medium.
    Type: Application
    Filed: July 16, 2007
    Publication date: September 17, 2009
    Inventors: Harald Hirschmann, Volker Reiffenrath
  • LIQUID CRYSTALLINE MEDIUM AND LIQUID CRYSTAL DISPLAY
    Publication number: 20090184291
    Abstract: A dielectrically positive liquid crystalline media comprising: a first dielectrically positive component, component A, comprising a dielectrically neutral compound of formula I wherein the parameters have the meanings defined herein; a second dielectrically positive component, component B, comprising one or more dielectrically positive compounds having a dielectric anisotropy of more than 3; and optionally a dielectrically neutral component, component C, comprising one or more dielectrically neutral compounds having a dielectric anisotropy in the range from ?1.5 to 3, are suitable for use in liquid crystal displays, especially active matrix displays, and in particular TN and to IPS displays.
    Type: Application
    Filed: March 16, 2009
    Publication date: July 23, 2009
    Inventors: Markus Czanta, Harald Hirschmann, Peer Kirsch, Volker Reiffenrath, Marcus Reuter, Christian Hock, Sayuri Ogiri, Shinji Nakajima
  • Liquid crystalline medium and liquid crystal display
    Patent number: 7563491
    Abstract: A dielectrically positive liquid crystalline media comprising: a first dielectrically positive component, component A, comprising a dielectrically neutral compound of formula I wherein the parameters have the meanings defined herein; a second dielectrically positive component, component B, comprising one or more dielectrically positive compounds having a dielectric anisotropy of more than 3; and optionally a dielectrically neutral component, component C, comprising one or more dielectrically neutral compounds having a dielectric anisotropy in the range from ?1.5 to 3, are suitable for use in liquid crystal displays, especially active matrix displays, and in particular TN and to IPS displays.
    Type: Grant
    Filed: March 16, 2007
    Date of Patent: July 21, 2009
    Assignee: Merck Patent GmbH
    Inventors: Markus Czanta, Harald Hirschmann, Peer Kirsch, Volker Reiffenrath, Marcus Reuter, Christian Hock, Sayuri Ogiri, Shinji Nakajima
  • 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 Comprising 1,2-Difluoroethene Compounds
    Publication number: 20080260971
    Abstract: The present invention relates to a liquid-crystalline medium comprising 1,2-difluoroethene compounds of the general formula I, in which R1, ring A, Z1, Z2, m, X and L1-6 are as defined in claim 1. The invention also relates to the use of the medium for electro-optical purposes and to displays containing this medium. Novel 1,2-difluoroethene compounds having 3 or more rings are disclosed.
    Type: Application
    Filed: May 18, 2006
    Publication date: October 23, 2008
    Inventors: Michael Wittek, Markus Czanta, Harald Hirschmann, Volker Reiffenrath
  • 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
    Publication number: 20080199635
    Abstract: The invention relates to a liquid-crystalline medium, characterised in that it comprises one or more compounds of the formula I in which R0, L1, n, A and B have the meanings indicated in Claim 1, furthermore to novel compounds of the formula I, to processes for the preparation thereof, to the use thereof in electronic and electro-optical devices, in particular in LC displays, and to LC displays containing same.
    Type: Application
    Filed: February 1, 2008
    Publication date: August 21, 2008
    Inventors: Harald HIRSCHMANN, Michael Wittek, Markus Czanta, Volker Reiffenrath
  • Fluorophenyl compounds for liquid-crystalline mixtures
    Publication number: 20080132716
    Abstract: Disclosed are compounds of formula I processes for the preparation thereof, and liquid-crystalline media and electro-optical displays containing said compounds.
    Type: Application
    Filed: September 12, 2007
    Publication date: June 5, 2008
    Inventors: Lars Lietzau, Markus Czanta, Harald Hirschmann, Michael Wittek
  • Liquid-crystal medium and electro-optical display containing same
    Patent number: 7314653
    Abstract: Disclosed are nematic liquid-crystal media which have an initial current density of 0.05 ?A/cm2 or less and a threshold voltage of 1.0 V or less and their use in liquid-crystal displays, preferably TN or STN displays.
    Type: Grant
    Filed: November 5, 2004
    Date of Patent: January 1, 2008
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Harald Hirschmann, Sabine Schoen
  • 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: 20070221880
    Abstract: A dielectrically positive liquid crystalline media comprising: a first dielectrically positive component, component A, comprising a dielectrically neutral compound of formula I wherein the parameters have the meanings defined herein; a second dielectrically positive component, component B, comprising one or more dielectrically positive compounds having a dielectric anisotropy of more than 3; and optionally a dielectrically neutral component, component C, comprising one or more dielectrically neutral compounds having a dielectric anisotropy in the range from ?1.5 to 3, are suitable for use in liquid crystal displays, especially active matrix displays, and in particular TN and to IPS displays.
    Type: Application
    Filed: March 16, 2007
    Publication date: September 27, 2007
    Inventors: Markus Czanta, Harald Hirschmann, Peer Kirsch, Volker Reiffenrath, Marcus Reuter, Christian Hock, Sayuri Ogiri, Shinji Nakajima
  • Tolane derivatives and liquid crystalline medium
    Patent number: 7255811
    Abstract: Tolane compounds of the formula I wherein R1, R2, L1, L2 and L3 are as defined herein, are described. Further described are liquid-crystalline media comprising at least one tolane compound of formula I as well as liquid-crystal display elements containing such a liquid-crystalline medium.
    Type: Grant
    Filed: May 19, 2004
    Date of Patent: August 14, 2007
    Assignee: Merck Patent GmbH
    Inventors: Harald Hirschmann, Kevin Adlem, Patricia Saxton, Mark John Goulding, Martin Heeney
  • 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
  • Nematic liquid-crystal mixture, and displays containing same
    Patent number: 7220464
    Abstract: A nematic liquid-crystal mixture contains a compound of formula I in which R11 and R12 are as defined in the specification, and a liquid-crystal displays containing same.
    Type: Grant
    Filed: February 13, 2004
    Date of Patent: May 22, 2007
    Assignee: Merck Patent Gesellschaft
    Inventors: Harald Hirschmann, Volker Reiffenrath
  • Liquid-crystalline medium
    Patent number: 7198828
    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, L8 and L9 are as defined in Claim 1.
    Type: Grant
    Filed: February 13, 2004
    Date of Patent: April 3, 2007
    Assignee: Merck Patent Gesellschaft
    Inventors: Harald Hirschmann, Peer Kirsch
  • 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
  • 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
  • 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