Patents by Inventor Michael Wittek

Michael Wittek 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 and liquid-crystal display
    Patent number: 8394292
    Abstract: The present invention relates to dielectrically positive liquid-crystalline media comprising a dielectrically neutral or slightly positive component, component A, comprising one or more dielectrically neutral or slightly positive compounds of the formula I in which the parameters have the meaning indicated in the specification, and a dielectrically positive component, component B, comprising one or more dielectrically positive compounds, and optionally a second dielectrically neutral component, component C, and to liquid-crystal displays containing these media, especially active-matrix displays and in particular TN, IPS and FFS displays.
    Type: Grant
    Filed: January 15, 2009
    Date of Patent: March 12, 2013
    Assignee: Merck Patent Gesellschaft mit beschränkter Haftung
    Inventors: Michael Wittek, Brigitte Schuler, Volker Reiffenrath
  • LIQUID CRYSTAL MEDIUM AND LIQUID CRYSTAL DISPLAY
    Publication number: 20130057947
    Abstract: The instant invention relates to mesogenic media exhibiting a blue phase, comprising two or more components selected from the following components, components A to C, component A comprising one or more compounds selected from the group of compounds of formula I-T component B consisting of one or more compounds selected from the group of compounds of formula I-N component C consisting of one or more compounds selected from the group of compounds of formula I-E wherein the parameters are as specified in the text, preferably stabilized by a polymer, and their use in electro-optical light modulation elements and their respective use in displays, as well as to such displays.
    Type: Application
    Filed: August 31, 2012
    Publication date: March 7, 2013
    Applicant: MERCK PATENT GESELLSCHAFT MIT BESCHRANKTER HAFTUNG
    Inventors: Michael WITTEK, Norihiko TANAKA, Mila FISCHER, Erdal DURMAZ
  • LIQUID-CRYSTALLINE MEDIUM
    Publication number: 20120326085
    Abstract: The invention relates to liquid-crystalline mixtures comprising at least one compound of the formula I, in which X, L1, L2, L3, L4 and alkenyl have the meanings indicated in claim 1, in order to increase the pretilt at the polyimide surface, and to liquid-crystalline media comprising one or more compounds of the formula I in electro-optical liquid-crystal displays and in LC lenses.
    Type: Application
    Filed: February 15, 2011
    Publication date: December 27, 2012
    Applicant: Merck Patent Gesellschaft Mit Beschrankter Haftung
    Inventors: Michael Wittek, Brigitte Schuler, Volker Reiffenrath
  • LIQUID-CRYSTALLINE MEDIUM
    Publication number: 20120314146
    Abstract: The invention relates to a liquid-crystalline medium comprising one or more compounds of the formula (I), in which R0 has the meanings indicated in Claim 1, and to the use thereof in electro-optical liquid-crystal displays.
    Type: Application
    Filed: January 25, 2011
    Publication date: December 13, 2012
    Applicant: MERCK PATENT GESELLSCHAFT MIT BESCHRANKTER HAFTUNG
    Inventors: Michael Wittek, Brigitte Schuler, Lars Lietzau
  • 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-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
  • Liquid-crystalline medium and liquid-crystal display
    Patent number: 8231806
    Abstract: The present invention relates to dielectrically positive liquid-crystalline media comprising in each case 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: Grant
    Filed: February 25, 2009
    Date of Patent: July 31, 2012
    Assignee: Merck Patent Gesellschaft mit beschränkter Haftung
    Inventors: Markus Czanta, Michael Wittek, Lars Lietzau, Marcus Reuter, Brigitte Schuler
  • 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
    Patent number: 8017200
    Abstract: Disclosed are a liquid-crystalline medium, which contains a compound of formula I and the use thereof for electro-optical purposes, in particular for TN, TFT, IPS or OCB displays.
    Type: Grant
    Filed: May 17, 2010
    Date of Patent: September 13, 2011
    Assignee: Merck Patent GmbH
    Inventors: Michael Wittek, Elvira Montenegro, Konstantin Schneider, Brigitte Schuler
  • Liquid-crystalline medium and liquid-crystal display
    Patent number: 8012370
    Abstract: The present invention relates to dielectrically positive liquid-crystalline media comprising a dielectrically positive component, component A, comprising a dielectrically positive compound of the formula (I), in which the parameters have the meaning indicated in the specification, and optionally a second dielectrically positive component, component B, comprising one or more dielectrically positive compounds having a dielectric anisotropy of greater than 3 and optionally a dielectrically neutral component, component C, and to liquid-crystal displays, especially to active-matrix displays and in particular to TN, IPS, FFS and OCB displays, containing these media.
    Type: Grant
    Filed: September 9, 2008
    Date of Patent: September 6, 2011
    Assignee: Merck Patent GmbH
    Inventors: Michael Wittek, Brigitte Schuler, Volker Reiffenrath, Atsutaka Manabe, Elisabeth Meyer, Mark Goebel
  • Liquid-crystalline medium
    Patent number: 7972664
    Abstract: Disclosed are a liquid-crystalline medium, which contains a compound of formula I and the use thereof for electro-optical purposes, in particular for TN, TFT, IPS or OCB displays.
    Type: Grant
    Filed: May 12, 2010
    Date of Patent: July 5, 2011
    Assignee: Merck Patent Gesellschaft MIT Beschrankter Haftung
    Inventors: Michael Wittek, Elvira Montenegro, Konstantin Schneider, Brigitte Schuler
  • Liquid-crystalline medium and liquid-crystal display
    Patent number: 7964253
    Abstract: Disclosed are dielectrically positive liquid-crystalline media containing a dielectrically positive component, component A, containing one or more dielectrically positive compounds of formula I and optionally a second dielectrically positive component, component B, containing one or more dielectrically positive compounds having a dielectric anisotropy of greater than 3, and optionally a dielectrically neutral component, component C, and to liquid-crystal displays, especially active-matrix displays and in particular TN, OCB, IPS and FFS displays, containing these media.
    Type: Grant
    Filed: April 28, 2010
    Date of Patent: June 21, 2011
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Michael Wittek, Brigitte Schuler, Lars Lietzau
  • 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
  • LIQUID-CRYSTALLINE MEDIUM AND LIQUID-CRYSTAL DISPLAY
    Publication number: 20110024682
    Abstract: The present invention relates to dielectrically positive liquid-crystalline media comprising in each case 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: February 25, 2009
    Publication date: February 3, 2011
    Applicant: Merck Patent Gesellschaft
    Inventors: Markus Czanta, Michael Wittek, Lars Lietzau, Marcus Reuter, Brigitte Schuler
  • 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: 20110001089
    Abstract: The invention relates to a liquid-crystalline medium comprising one or more compounds of the formula I in which R0, X0 and L1-6 have the meanings indicated in Claim 1, and to the use thereof in electro-optical liquid-crystal displays.
    Type: Application
    Filed: February 18, 2009
    Publication date: January 6, 2011
    Applicant: Merck Patent Gesellschaft
    Inventors: Michael Wittek, Brigitte Schuler, Volker Reiffenrath, Mark Goebel, Markus Czanta
  • 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 AND LIQUID-CRYSTAL DISPLAY
    Publication number: 20100314582
    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 23, 2009
    Publication date: December 16, 2010
    Inventors: Michael Wittek, Markus Czanta, Atsutaka Manabe, Lars Lietzau, Marcus Reuter, Brigitte Schuler, Elisabeth Meyer