Patents by Inventor Melanie Klasen-Memmer

Melanie Klasen-Memmer 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).

  • 2, 5-selenophene derivatives and 2, 5-tellurophene derivatives
    Patent number: 8304036
    Abstract: The invention relates to 2,5-selenophene derivatives and 2,5-tellurophene derivatives, inter alia for use as components in liquid-crystal mixtures, and to liquid-crystal mixtures which comprise the compounds, and to liquid-crystal displays based on these mixtures. The invention furthermore relates to processes for the preparation of the compounds and to Se/Te-containing intermediates.
    Type: Grant
    Filed: August 7, 2008
    Date of Patent: November 6, 2012
    Assignee: Merck Patent Gesellschaft Mit Beschrankter Haftung
    Inventors: Axel Jansen, Detlef Pauluth, Melanie Klasen-Memmer
  • Benzo[f]chrome any pyrano[3,2-f]chrome derivatives for use in liquid crystal media
    Patent number: 8303844
    Abstract: The present invention relates to benzo[f]chromene and pyrano[3,2-f]-chromene derivatives of the formula I in which L1, L2, R1, R2, A1, A2, Z1, Z2, m and n are as defined in claim 1, to the preparation thereof, to the use thereof as components in liquid-crystalline media, and to electro-optical display elements which contain the liquid-crystalline media according to the invention.
    Type: Grant
    Filed: November 3, 2008
    Date of Patent: November 6, 2012
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Axel Jansen, Melanie Klasen-Memmer
  • LIQUID CRYSTALLINE MEDIUM
    Publication number: 20120248374
    Abstract: The present invention relates to a liquid-crystalline medium based on a mixture of polar compounds having negative dielectric anisotropy (??), which is distinguished by the fact that it has a value for the ratio ?1/?n2 in the range 6-45 with a clearing point of >60° C. and a ?? of ??2.3. Media of this type are particularly suitable for electro-optical displays having active-matrix addressing based on the ECB, PA LCD, FFS or IPS effect.
    Type: Application
    Filed: June 15, 2012
    Publication date: October 4, 2012
    Applicant: Merck Patent GmbH
    Inventors: Melanie KLASEN-MEMMER, Sabine SCHOEN
  • Liquid-crystalline medium
    Patent number: 8277907
    Abstract: The present invention relates to a liquid-crystalline medium based on a mixture of polar compounds having negative dielectric anisotropy (??), which is distinguished by the fact that it has a value for the ratio ?1/?n2 in the range 6-45 with a clearing point of >60° C. and a ?? of ??2.3. Media of this type are particularly suitable for electro-optical displays having active-matrix addressing based on the ECB, PA LCD, FFS or IPS effect.
    Type: Grant
    Filed: June 28, 2011
    Date of Patent: October 2, 2012
    Assignee: Merck Patent GmbH
    Inventors: Melanie Klasen-Memmer, Sabine Schoen
  • Liquid-crystal medium
    Patent number: 8277684
    Abstract: The invention relates to a liquid-crystalline medium of negative dielectric anisotropy based on a mixture of polar compounds, which comprises at least one compound selected from the group of the compounds of the formulae IA, IB and IC in which R1A, R2A, R1B, R2B, R1C, R2C, L, m, n, o, p and b have the meanings indicated in Claim 1, and to the use thereof for an active-matrix display, in particular based on the ECB, PALC, FFS or IPS effect.
    Type: Grant
    Filed: August 7, 2008
    Date of Patent: October 2, 2012
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Melanie Klasen-Memmer, Matthias Bremer, Kazuaki Tarumi
  • LIQUID-CRYSTALLINE MEDIUM
    Publication number: 20120228549
    Abstract: Disclosed are a liquid-crystalline medium of negative dielectric anisotropy based on a mixture of polar compounds, which contains at least one compound of formula IA and at least one compound of formulae IB, IC and/or ID and the use thereof for an active-matrix display, in particular based on the ECB, PALO, FFS or IPS effect.
    Type: Application
    Filed: May 22, 2012
    Publication date: September 13, 2012
    Applicant: MERCK PATENT GMBH
    Inventors: Melanie KLASEN-MEMMER, Matthias BREMER
  • Liquid-crystalline medium and liquid-crystal display
    Patent number: 8202584
    Abstract: Disclosed are a dielectrically negative, liquid-crystalline medium which contains a (first) dielectrically negative component (component A), which contains one or more dielectrically negative compounds of formula I and a further (second) dielectrically negative component (component B), and the use thereof in an electro-optical display, particularly in an active-matrix display based on the VA, ECB, PS-VA, FFS or IPS effect, and displays of this type.
    Type: Grant
    Filed: April 5, 2010
    Date of Patent: June 19, 2012
    Assignee: Merck Patent GmbH
    Inventors: Melanie Klasen-Memmer, Axel Jansen, Detlef Pauluth
  • 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
  • LIQUID CRYSTALLINE MEDIUM
    Publication number: 20110278502
    Abstract: The present invention relates to a liquid-crystalline medium based on a mixture of polar compounds having negative dielectric anisotropy (??), which is distinguished by the fact that it has a value for the ratio ?1/?n2 in the range 6-45 with a clearing point of >60° C. and a ?? of ??2.3. Media of this type are particularly suitable for electro-optical displays having active-matrix addressing based on the ECB, PA LCD, FFS or IPS effect.
    Type: Application
    Filed: June 28, 2011
    Publication date: November 17, 2011
    Inventors: Melanie KLASEN-MEMMER, Sabine Schoen
  • LIQUID-CRYSTAL DISPLAY
    Publication number: 20110255048
    Abstract: The present invention relates to liquid-crystal (LC) media for use in LC displays of the PS (polymer stabilised) or PSA (polymer sustained alignment) type.
    Type: Application
    Filed: November 26, 2009
    Publication date: October 20, 2011
    Applicant: Merck Patent Gesellschaft MIT Beschraenkter Haftung
    Inventors: Achim Goetz, Melanie Klasen-Memmer, Stepham Derow
  • LIQUID-CRYSTALLINE MEDIUM
    Publication number: 20110253937
    Abstract: The present invention relates to a liquid-crystalline medium based on a mixture of polar compounds having negative dielectric anisotropy (??), which is distinguished by the fact that it has a value for the ratio ?1/?n2 in the range 6-45 with a clearing point of >60° C. and a ?? of ??2.3. Media of this type are particularly suitable for electro-optical displays having active-matrix addressing based on the ECB, PA LCD, FFS or IPS effect.
    Type: Application
    Filed: June 28, 2011
    Publication date: October 20, 2011
    Inventors: Melanie KLASEN-MEMMER, Sabine SCHOEN
  • LIQUID-CRYSTALLINE MEDIUM
    Publication number: 20110253938
    Abstract: The present invention relates to a liquid-crystalline medium based on a mixture of polar compounds having negative dielectric anisotropy (??), which is distinguished by the fact that it has a value for the ratio ?1/?n2 in the range 6-45 with a clearing point of >60° C. and a ?? of ??2.3. Media of this type are particularly suitable for electro-optical displays having active-matrix addressing based on the ECB, PA LCD, FFS or IPS effect.
    Type: Application
    Filed: June 28, 2011
    Publication date: October 20, 2011
    Inventors: Melanie KLASEN-MEMMER, Sabine SCHOEN
  • LIQUID-CRYSTAL MEDIUM
    Publication number: 20110248216
    Abstract: The invention relates to a liquid-crystalline medium having negative dielectric anisotropy which comprises at least one compound of the formula I in which R1, R1* and a have the meanings indicated in Claim 1, and to the use thereof for an active-matrix display, in particular based on the VA, PS-VA, PALC, FFS or IPS effect.
    Type: Application
    Filed: December 17, 2009
    Publication date: October 13, 2011
    Applicant: MERCK PATENT GMBH
    Inventors: Melanie Klasen-Memmer, Matthias Bremer, Konstantin Schneider, Detlef Pauluth
  • Liquid-crystalline medium
    Patent number: 8025935
    Abstract: The invention relates to a liquid-crystalline medium having negative dielectric anisotropy based on a mixture of polar compounds, which comprises at least one compound of the formula I in which R11 and R12 have the meanings indicated in claim 1, in amounts of ?30% by weight, based on the medium, and to the use thereof for an active-matrix display based on the ECB, PALC, FFS or IPS effect.
    Type: Grant
    Filed: August 3, 2006
    Date of Patent: September 27, 2011
    Assignee: Merck Patent GmbH
    Inventors: Melanie Klasen-Memmer, Elisabeth Meyer, Detlef Pauluth, Andreas Taugerbeck
  • LIQUID-CRYSTAL MEDIUM
    Publication number: 20110193020
    Abstract: The invention relates to a liquid-crystalline medium of negative dielectric anisotropy based on a mixture of polar compounds, which comprises at least one compound selected from the group of the compounds of the formulae IA, IB and IC in which R1A, R2A, R1B, R2B, R1C, R2C, L, m, n, o, p and b have the meanings indicated in Claim 1, and to the use thereof for an active-matrix display, in particular based on the ECB, PALC, FFS or IPS effect.
    Type: Application
    Filed: August 7, 2008
    Publication date: August 11, 2011
    Inventors: Melanie Klasen-Memmer, Matthias Bremer, Kazuaki Tarumi
  • Liquid crystalline medium
    Patent number: 7989035
    Abstract: The present invention relates to a liquid-crystalline medium based on a mixture of polar compounds having negative dielectric anisotropy (??), which is distinguished by the fact that it has a value for the ratio ?1/?n2 in the range 6-45 with a clearing point of >60° C. and a ?? of ??2.3. Media of this type are particularly suitable for electro-optical displays having active-matrix addressing based on the ECB, PA LCD, FFS or IPS effect.
    Type: Grant
    Filed: July 1, 2005
    Date of Patent: August 2, 2011
    Assignee: Merck Patent GmbH
    Inventors: Melanie Klasen-Memmer, Sabine Schoen
  • Liquid crystalline medium
    Patent number: 7981487
    Abstract: Disclosed are a liquid-crystalline medium of negative dielectric anisotropy based on a mixture of polar compounds, which contains at least one compound of formula IA and at least one compound of formulae IB, IC and/or ID and the use thereof for an active-matrix display, in particular based on the ECB, PALC, FFS or IPS effect.
    Type: Grant
    Filed: June 8, 2010
    Date of Patent: July 19, 2011
    Assignee: Merck Patent GmbH
    Inventors: Melanie Klasen-Memmer, Matthias Bremer
  • BENZO[F]CHROME ANY PYRANO[3,2-F]CHROME DERIVATIVES FOR USE IN LIQUID CRYSTAL MEDIA
    Publication number: 20110043746
    Abstract: The present invention relates to benzo[f]chromene and pyrano[3,2-f]-chromene derivatives of the formula I in which L1, L2, R1, R2, A1, A2, Z1, Z2, m and n are as defined in claim 1, to the preparation thereof, to the use thereof as components in liquid-crystalline media, and to electro-optical display elements which contain the liquid-crystalline media according to the invention.
    Type: Application
    Filed: November 3, 2008
    Publication date: February 24, 2011
    Applicant: MERCK PATENT GESELLSCHAFT MIT BESCHRANKTER HAFTUNG
    Inventors: Axel Jansen, Melanie Klasen-Memmer
  • Liquid-crystalline medium
    Patent number: 7854970
    Abstract: Disclosed are a liquid-crystalline medium based on a mixture of polar compounds which contain at least one compound of formula I and the use thereof for a passive-matrix or active-matrix display based on the ECB, FFS, PALC or IPS effect.
    Type: Grant
    Filed: September 2, 2008
    Date of Patent: December 21, 2010
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Melanie Klasen-Memmer, Axel Jansen, Izumi Saito
  • LIQUID CRYSTAL DISPLAY
    Publication number: 20100304049
    Abstract: The present invention relates to a liquid-crystal (LC) display of the PSA (polymer sustained alignment) type, and to polymerisable compounds and LC media for use in PSA displays.
    Type: Application
    Filed: July 30, 2008
    Publication date: December 2, 2010
    Applicant: MERCK PATENT GESELLSCHAFT MIT BESCHRANKTER HAFTUNG
    Inventors: Georg Bernatz, Melanie Klasen-Memmer, Matthias Bremer