Patents by Inventor Lars Lietzau

Lars Lietzau 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).

  • Thiophene compounds for liquid-crystalline media
    Patent number: 8609714
    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: Grant
    Filed: February 16, 2010
    Date of Patent: December 17, 2013
    Assignee: MERCK PATENT GmbH
    Inventors: Lars Lietzau, Louise Diane Farrand, Markus Czanta, Harald Hirschmann, Michael Wittek, Izumi Saito, Brigitte Schuler
  • Tetrahydropyran compounds
    Patent number: 8465672
    Abstract: The invention relates to mesogenic tetrahydropyran compounds having at least four rings, of the formula I in which R1, A1, A2, X1, L1, L2, m and n have the meanings indicated in Claim 1, and to a process for the preparation thereof, to the use thereof in liquid-crystalline media, 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: Grant
    Filed: July 17, 2007
    Date of Patent: June 18, 2013
    Assignee: Merck Patent GmbH
    Inventors: Lars Lietzau, Markus Czanta, Atsutaka Manabe
  • Liquid-crystalline medium and liquid-crystal display
    Patent number: 8404150
    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 23, 2009
    Date of Patent: March 26, 2013
    Assignee: Merck Patent GmbH
    Inventors: Michael Wittek, Markus Czanta, Atsutaka Manabe, Lars Lietzau, Marcus Reuter, Brigitte Schuler, Elisabeth Meyer
  • 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 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: 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
  • Liquid crystalline medium and liquid crystal display
    Patent number: 8221854
    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 great than 3, and optionally a 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: April 1, 2008
    Date of Patent: July 17, 2012
    Assignee: Merck Patent Gesellschaft MIT Beschränkter Haftung
    Inventors: Markus Czanta, Andreas Taugerbeck, Renate Bender, Lars Lietzau
  • Liquid-crystalline compounds
    Patent number: 8197709
    Abstract: The present invention relates to chemical compounds containing five or more benzene rings arranged in a linear manner and two bridging units between these rings, where at least one of these units represents a —CF2O— bridge. The invention additionally relates to liquid-crystalline media and to high-frequency components comprising these media, in particular antennae, especially for the gigahertz range.
    Type: Grant
    Filed: November 3, 2010
    Date of Patent: June 12, 2012
    Assignee: Merck Patent Gesellschaft mit berschrankter Haftung
    Inventors: Lars Lietzau, Werner Binder, Atsutaka Manabe, Helmut Haensel
  • Liquid-crystalline medium
    Patent number: 8168081
    Abstract: The invention relates to a liquid-crystalline medium based on a mixture of dielectrically negative, polar compounds which comprises at least one compound of the formula I in which the parameters have the meanings indicated in claim 1, to the use thereof in an electro-optical display, particularly in an active-matrix display based on the VA, ECB, PALC, FFS or IPS effect, and to displays of this type.
    Type: Grant
    Filed: July 17, 2007
    Date of Patent: May 1, 2012
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Melanie Klasen-Memmer, Georg Bernatz, Izumi Saito, Matthias Bremer, Lars Lietzau, Volker Reiffenrath
  • Cyclohexene compounds for liquid-crystalline mixtures
    Patent number: 8163200
    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: Grant
    Filed: July 18, 2007
    Date of Patent: April 24, 2012
    Assignee: Merck Patent Gesellschaft MIT Beschraenkter Haftung
    Inventors: Lars Lietzau, Markus Czanta, Atsutaka Manabe, Kai Jaehrling
  • 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
  • TETRAHYDROPYRAN COMPOUNDS
    Publication number: 20110253934
    Abstract: The invention relates to mesogenic tetrahydropyran compounds having at least four rings, of the formula I in which R1, A1, A2, X1, L1, L2, m and n have the meanings indicated in Claim 1, and to a process for the preparation thereof, to the use thereof in liquid-crystalline media, 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: July 17, 2007
    Publication date: October 20, 2011
    Inventors: Lars Lietzau, Markus Czanta, Atsutaka Manabe
  • Pyridine compounds for liquid-crystalline mixtures
    Patent number: 8012547
    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: Grant
    Filed: April 1, 2008
    Date of Patent: September 6, 2011
    Assignee: Merch Patent GmbH
    Inventors: Lars Lietzau, Markus Czanta
  • 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 COMPOUNDS
    Publication number: 20110101271
    Abstract: The present invention relates to chemical compounds containing five or more benzene rings arranged in a linear manner and two bridging units between these rings, where at least one of these units represents a —CF2O— bridge. The invention additionally relates to liquid-crystalline media and to high-frequency components comprising these media, in particular antennae, especially for the gigahertz range.
    Type: Application
    Filed: November 3, 2010
    Publication date: May 5, 2011
    Applicant: MERCK PATENT GESELLSCHAFT MIT BESCHRANKTER HAFTUNG
    Inventors: Lars Lietzau, Werner Binder, Atsutaka Manabe, Helmut Haensel
  • -Indacene and indeno[5,6-d][1,3]dioxol-derivatives and use thereof as components of liquid-crystal mixtures
    Patent number: 7922934
    Abstract: The invention relates 1,2,3,6,7,8-hexahydro-s-indacene derivatives and 6,7-dihydro-5H-indeno[5,6-d]-1,3-dioxole derivatives, and to the use thereof as component(s) in liquid-crystalline media. In addition, the present invention relates to liquid-crystal and electro-optical display elements which contain the liquid-crystalline media according to the invention.
    Type: Grant
    Filed: July 11, 2006
    Date of Patent: April 12, 2011
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Lars Lietzau, Detlef Pauluth, Markus Czanta
  • 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 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
  • Liquid-crystalline medium and liquid-crystal display
    Publication number: 20100276635
    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: Application
    Filed: April 28, 2010
    Publication date: November 4, 2010
    Applicant: Merck Patent GMBH
    Inventors: Michael Wittek, Brigitte Schuler, Lars Lietzau
  • CYCLOHEXENE COMPOUNDS FOR LIQUID-CRYSTALLINE MIXTURES
    Publication number: 20100237285
    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: July 18, 2007
    Publication date: September 23, 2010
    Inventors: Lars Lietzau, Markus Czanta, Atsutaka Manabe, Kai Jaehrling