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: 20130248762
    Abstract: The invention relates to liquid-crystalline media comprising at least one compound of the formula I, in which R0, R0* and ring A have the meanings indicated in Claim 1, and to electro-optical liquid-crystal displays, in particular for TN-TFT, OCB, IPS, PS-IPS, FFS, PS-FFS and positive VA applications.
    Type: Application
    Filed: November 14, 2011
    Publication date: September 26, 2013
    Applicant: Merck Patent GmbH
    Inventors: Harald Hirschmann, Michael Wittek, Markus Czanta, Brigitte Schuler, Volker Reiffenrath
  • 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
  • Thiophene derivatives, and LC media comprising same
    Patent number: 8486297
    Abstract: The present invention relates to thiophene derivatives, to processes and intermediates for the preparation thereof, to the use thereof for optical, electro-optical and electronic purposes, in particular in liquid-crystal (LC) media and LC displays, and to LC media and LC displays comprising same.
    Type: Grant
    Filed: February 3, 2010
    Date of Patent: July 16, 2013
    Assignee: Merck Patent GmbH
    Inventors: Axel Jansen, Detlef Pauluth, Harald Hirschmann, Markus Czanta
  • Thiophene derivatives, and LC media containing same
    Patent number: 8394293
    Abstract: The present invention relates to thiophene derivatives, to processes and intermediates for the preparation thereof, to the use thereof for optical, electro-optical and electronic purposes, in particular in liquid-crystal (LC) media and LC displays, and to LC media and LC displays comprising same.
    Type: Grant
    Filed: March 30, 2009
    Date of Patent: March 12, 2013
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Axel Jansen, Detlef Pauluth, Harald Hirschmann, Markus Czanta
  • LIQUID CRYSTAL MEDIUM
    Publication number: 20120273723
    Abstract: The invention relates to compounds of the formula I in which R0, A0, A1, A2, Z0, Z1, Z2, L1, L2, X, l, m and n have the meanings indicated in claim 1, and to the use thereof in liquid-crystalline media, and to liquid-crystalline media comprising one or more compounds of the formula I in electro-optical liquid-crystal displays.
    Type: Application
    Filed: November 29, 2010
    Publication date: November 1, 2012
    Applicant: MERCK PATENT GESELLSCHAFT MIT BESCHRANKTER HAFTUNG
    Inventors: Michael Wittek, Brigitte Schuler, Volker Reiffenrath, Axel Jansen, Christian Hock, Harald Hirschmann
  • LIQUID CRYSTALLINE MEDIUM AND LIQUID CRYSTALLINE DISPLAY
    Publication number: 20120261616
    Abstract: The present invention relates to dielectrically positive liquid-crystalline media comprising one or more compounds of the formula I in which the parameters have the respective meanings indicated in the specification, and optionally one or more further dielectrically positive compounds and optionally one or more further dielectrically neutral compounds, and to liquid-crystal displays containing these media, especially to active-matrix displays and in particular to TN, IPS and FFS displays.
    Type: Application
    Filed: November 29, 2010
    Publication date: October 18, 2012
    Applicant: Merck Patent Gesellschaft Mit Beschrankter Haftung
    Inventors: Markus Czanta, Harald Hirschmann, Sven Baran, Lars Lietzau
  • Liquid-crystalline medium and liquid-crystal display
    Patent number: 8268191
    Abstract: The present invention relates to dielectrically positive liquid-crystalline media comprising one or more compounds of the formula I in which the parameters have the meaning indicated in the specification, and optionally one or more compounds selected from the group of the compounds of the formulae II and III in which the parameters have the meaning indicated in the specification, and optionally one or more compounds of the formula IV in which the parameters have the meaning indicated in the specification, and to liquid-crystal displays containing these media, especially to active-matrix displays and in particular to TN, IPS and FFS displays.
    Type: Grant
    Filed: January 27, 2009
    Date of Patent: September 18, 2012
    Assignee: Merck Patent GmbH
    Inventors: Markus Czanta, Harald Hirschmann, Michael Wittek, Volker Reiffenrath, Renate Bender, Christian Hock, Brigitte Schuler
  • Liquid-crystalline medium
    Patent number: 8236390
    Abstract: The invention relates to a liquid-crystalline medium based on a mixture of polar compounds, characterized in that it comprises one or more compounds of the formula I in which R1, X1, L1-5 have the meanings indicated in Claim 1, and to the use thereof for electro-optical purposes, in particular TN monitor applications.
    Type: Grant
    Filed: December 17, 2008
    Date of Patent: August 7, 2012
    Assignee: Merck Patent Gesellschaft mit beschränkter Haftung
    Inventors: Harald Hirschmann, Michael Wittek, Sabine Schoen
  • THIOPHENE DERIVATIVES, AND LC MEDIA COMPRISING SAME
    Publication number: 20120001123
    Abstract: The present invention relates to thiophene derivatives, to processes and intermediates for the preparation thereof, to the use thereof for optical, electro-optical and electronic purposes, in particular in liquid-crystal (LC) media and LC displays, and to LC media and LC displays comprising same.
    Type: Application
    Filed: February 3, 2010
    Publication date: January 5, 2012
    Applicant: MERCK PATENT GESELLSCHAFT MIT BESCHRANKTER HAFTUNG
    Inventors: Axel Jansen, Detlef Pauluth, Harald Hirschmann, Markus Czanta
  • THIOPHENE COMPOUNDS FOR LIQUID-CRYSTALLINE MEDIA
    Publication number: 20110301360
    Abstract: The invention relates to liquid-crystalline compounds of the formula I in which R1, R2, A1, A2, A3, A4, Z1, Z2, Z3, V, a, b and c have the meanings indicated in Claim 1, and to liquid-crystalline media comprising at least one compound of the formula I, and to electro-optical displays containing a liquid-crystalline medium of this type.
    Type: Application
    Filed: February 16, 2010
    Publication date: December 8, 2011
    Applicant: MERCK PATENT GESELLSCHAFT MIT BESCHRANKTER HAFTUNG
    Inventors: Lars Lietzau, Louise Diane Farrand, Markus Czanta, Harald Hirschmann, Michael Wittek, Izumi Saito, Brigitte Schuler
  • Liquid-crystalline medium and liquid-crystal display comprising 1,2-difluoroethene compounds
    Patent number: 7923079
    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: December 4, 2009
    Date of Patent: April 12, 2011
    Assignee: Merck Patent GmbH
    Inventors: Michael Wittek, Markus Czanta, Harald Hirschmann, Volker Reiffenrath
  • Thiophene derivatives, and LC media containing same
    Publication number: 20110049427
    Abstract: The present invention relates to thiophene derivatives, to processes and intermediates for the preparation thereof, to the use thereof for optical, electro-optical and electronic purposes, in particular in liquid-crystal (LC) media and LC displays, and to LC media and LC displays comprising same.
    Type: Application
    Filed: March 30, 2009
    Publication date: March 3, 2011
    Applicant: MERCK PATENT GESELLSCHAFT
    Inventors: Axel Jansen, Detlef Pauluth, Harald Hirschmann, Markus Czanta
  • LIQUID-CRYSTALLINE MEDIUM
    Publication number: 20110001090
    Abstract: The invention relates to a liquid-crystalline medium comprising one or more compounds of the formula I in which R0, ring A and L1-4 have the meanings indicated in claim 1, and to the use thereof in electro-optical liquid-crystal displays.
    Type: Application
    Filed: February 19, 2009
    Publication date: January 6, 2011
    Inventors: Michael Wittek, Brigitte Schuler, Harald Hirschmann, Volker Reiffenrath, Markus Czanta, Christian Schoenefeld
  • Liquid-crystalline medium and liquid-crystal display
    Publication number: 20100327226
    Abstract: The present invention relates to dielectrically positive liquid-crystalline media comprising one or more compounds of the formula I in which the parameters have the meaning indicated in the specification, and optionally one or more compounds selected from the group of the compounds of the formulae II and III in which the parameters have the meaning indicated in the specification, and optionally one or more compounds of the formula IV in which the parameters have the meaning indicated in the specification, and to liquid-crystal displays containing these media, especially to active-matrix displays and in particular to TN, IPS and FFS displays.
    Type: Application
    Filed: January 27, 2009
    Publication date: December 30, 2010
    Applicant: Merck Patent GmbH
    Inventors: Markus Czanta, Harald Hirschmann, Michael Wittek, Volker Reiffenrath, Renate Bender, Christian Hock, Brigitte Schuler
  • LIQUID-CRYSTALLINE MEDIUM
    Publication number: 20100320420
    Abstract: The invention relates to a liquid-crystalline medium based on a mixture of polar compounds, characterised in that it comprises one or more compounds of the formula I in which R1, X1, L1-5 have the meanings indicated in Claim 1, and to the use thereof for electro-optical purposes, in particular TN monitor applications.
    Type: Application
    Filed: December 17, 2008
    Publication date: December 23, 2010
    Applicant: Merck Patent Gesellschaft Mit Beschrankter Haftung
    Inventors: Harald Hirschmann, Michael Wittek, Sabine Schoen
  • Liquid-crystalline medium
    Patent number: 7807236
    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: Grant
    Filed: February 1, 2008
    Date of Patent: October 5, 2010
    Assignee: Merck Patent Gesellschaft
    Inventors: Harald Hirschmann, Michael Wittek, Markus Czanta, Volker Reiffenrath
  • Fluorophenyl compounds for liquid-crystalline mixtures
    Patent number: 7767277
    Abstract: Disclosed are compounds of formula I processes for the preparation thereof, and liquid-crystalline media and electro-optical displays containing said compounds.
    Type: Grant
    Filed: September 12, 2007
    Date of Patent: August 3, 2010
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Lars Lietzau, Markus Czanta, Harald Hirschmann, Michael Wittek
  • Liquid crystalline medium and liquid crystal display
    Patent number: 7740918
    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, 2009
    Date of Patent: June 22, 2010
    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 COMPRISING 1,2-DIFLUOROETHENE COMPOUNDS
    Publication number: 20100085529
    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: December 4, 2009
    Publication date: April 8, 2010
    Inventors: Michael Wittek, Markus Czanta, Harald Hirschmann, Volker Reiffenrath
  • Liquid crystalline medium
    Patent number: 7658978
    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: Grant
    Filed: July 16, 2007
    Date of Patent: February 9, 2010
    Assignee: Merck Patent Gesellschaft
    Inventors: Harald Hirschmann, Volker Reiffenrath