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).

  • Cyclopenta[a]naphthaline derivatives
    Patent number: 7575785
    Abstract: The present invention relates to cyclopenta[a]naphthalene derivatives of the general formulae I to V in which B, Z, A, n, R, X1, X1a, X1b, X2, X3, E1 and E2 are as defined in the claims, to the use thereof in liquid-crystalline media, to liquid-crystalline media comprising at least one of these cyclopenta[a]naphthalene derivatives, and to electro-optical display elements containing these liquid-crystalline media.
    Type: Grant
    Filed: August 2, 2004
    Date of Patent: August 18, 2009
    Assignee: Merck Patent GmbH
    Inventors: Lars Lietzau, Matthias Bremer, Melanie Klasen-Memmer
  • Liquid-crystal medium
    Patent number: 7560147
    Abstract: The invention relates to a liquid-crystalline medium based on a mixture of polar compounds which comprises at least one compound of the formula I in which R11, R12, A1, A2, Z1, Z2, m and n have the meanings indicated in claim 1, and to the use thereof for an active-matrix display based on the ECB, PALC or IPS effect.
    Type: Grant
    Filed: March 8, 2006
    Date of Patent: July 14, 2009
    Assignee: Merck Patent GmbH
    Inventors: Melanie Klasen-Memmer, Matthias Bremer, Detlef Pauluth, Barbara Hornung, Wolfgang Schmidt, Rainer Wingen
  • As-indacen derivatives
    Patent number: 7517471
    Abstract: The present invention relates to compounds of the formula I where X1, X2, R1, R2, A1, A2, Z1, Z2, m, n and rings B and B? are as defined in claim 1.
    Type: Grant
    Filed: April 12, 2005
    Date of Patent: April 14, 2009
    Assignee: Merck Patent GmbH
    Inventors: Lars Lietzau, Matthias Bremer, Melanie Klasen-Memmer
  • Dibenzofuran derivatives, dibenzothiophene derivatives and fluorene derivatives
    Patent number: 7514127
    Abstract: The present invention relates to compounds of the formula I where Y, X1, X2, X3, R1, R2, A1, A2, Z1, Z2, m and n are as defined in Claim 1, to the use thereof as components in liquid-crystalline media, and to electro-optical display elements containing the liquid-crystalline media according to the invention.
    Type: Grant
    Filed: March 18, 2005
    Date of Patent: April 7, 2009
    Assignee: Merck Patent GmbH
    Inventors: Lars Lietzau, Matthias Bremer, Melanie Klasen-Memmer
  • Liquid crystalline medium and liquid crystal display
    Patent number: 7482044
    Abstract: Disclosed are compounds of formula I and dielectrically positive liquid crystalline media comprising a dielectrically positive component, component A, comprising a dielectrically positive compound of formula I, and optionally 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 dielectric neutral component, component C, as well as to liquid crystal displays comprising these media, especially to active matrix displays and in particular to TN and to IPS displays.
    Type: Grant
    Filed: April 6, 2007
    Date of Patent: January 27, 2009
    Assignee: Merck Patent Gesellschaft Mit Beschrankter Haftung
    Inventors: Markus Czanta, Melanie Klasen-Memmer, Lars Lietzau
  • Benzochromene Derivatives
    Publication number: 20090023802
    Abstract: The present invention relates to benzochromene derivatives of the formula I where the various parameters have the meaning indicated in the text, and to liquid-crystal media which comprise these compounds, and to the use of the media in electro-optical displays, in particular in VAN-LCDs, and to the use of the compounds and physiologically acceptable derivatives thereof as therapeutic active ingredients.
    Type: Application
    Filed: December 5, 2006
    Publication date: January 22, 2009
    Inventors: Andreas Taugerbeck, Melanie Klasen-Memmer
  • Liquid-Crystalline Medium
    Publication number: 20080315157
    Abstract: The invention relates to a liquid-crystalline medium based on a mixture of polar compounds which comprises at least one compound of the formula (I) in which R11, R12 and Z1 have the meanings indicated in Claim 1, and to the use thereof for an active-matrix display based on the ECB, FFS or IPS effect.
    Type: Application
    Filed: December 8, 2006
    Publication date: December 25, 2008
    Applicant: MERCK PATENT GESELLSCHAFT
    Inventors: Melanie Klasen-Memmer, Volker Reiffenrath
  • Liquid Crystalline Medium
    Publication number: 20080308768
    Abstract: The present invention relates to a liquid-crystalline medium based on a mixture of polar compunds 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: July 1, 2005
    Publication date: December 18, 2008
    Inventors: Melanie Klasen-Memmer, Sabine Schoen
  • Polymerisable monocyclic compounds
    Patent number: 7465479
    Abstract: The invention relates to polymerisable monocyclic compounds, their use in liquid crystal mixtures, polymers and polymer films, and the use of the compounds, mixtures, polymers and polymer films in optical, electrooptical and electronic devices, for decorative and security applications.
    Type: Grant
    Filed: December 23, 2002
    Date of Patent: December 16, 2008
    Assignee: Merck Patent Gesellschaft Mit Beschraenkter Haftung
    Inventors: Matthias Bremer, Melanie Klasen-Memmer, Dagmar Klement, Stephan Derow
  • Liquid-crystalline medium
    Patent number: 7449222
    Abstract: The invention relates to a liquid-crystalline medium based on a mixture of polar compounds of positive dielectric anisotropy, comprising at least one pyran compound of the formula I and one or more compounds selected from the group consisting of the compounds C1 to C9 in which R, R1, the rings A, B and P, L1, L2, X, X1, Z1, Z2, m and n are as defined in Claim 1, and to electro-optical displays containing a liquid-crystalline medium of this type.
    Type: Grant
    Filed: December 17, 2004
    Date of Patent: November 11, 2008
    Assignee: Merck Patent Gesellschaft Mit Beschrankter Haftung
    Inventors: Michael Heckmeier, Melanie Klasen-Memmer, Georg Luessem, Eike Poetsch, Peer Kirsch, Marcus Reuter, Brigitte Schuler, Izumi Saito
  • Liquid crystalline medium and liquid crystal display
    Patent number: 7445819
    Abstract: A dielectrically positive liquid crystalline media comprising a dielectrically positive component, component A, comprising a dielectrically positive compound of formula I wherein the parameters have the meaning given in the specification, and optionally 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 dielectric neutral component, component C, is suitable for use in liquid crystal displays, especially active matrix displays, and, in particular, TN and to IPS displays.
    Type: Grant
    Filed: January 26, 2007
    Date of Patent: November 4, 2008
    Assignee: Merck Patent GmbH
    Inventors: Markus Czanta, Melanie Klasen-Memmer, Eike Poetsch, Lars Lietzau
  • Spiro[3.3] Heptyl-Dioxan Derivatives and Their Use in Liquid Crystal Media
    Publication number: 20080251761
    Abstract: The invention relates to novel dioxane derivatives of the formula R1-(A1-Z1)mG-(Z2-A2)n-R2, in which G denotes (I) or (II), and in which R1, R2, A1, A2, Z1, Z2, m and n have the meanings indicated in claim 1, to the use thereof as component(s) of liquid-crystalline media, and to liquid-crystal and electro-optical display elements which contain the liquid-crystalline media according to the invention.
    Type: Application
    Filed: October 11, 2006
    Publication date: October 16, 2008
    Inventors: Lars Lietzau, Werner Binder, Melanie Klasen-Memmer, Eike Poetsch, Markus Czanta
  • Liquid-crystalline medium
    Patent number: 7425355
    Abstract: A liquid-crystalline medium based on a mixture of polar compounds which comprises at least one compound of the formula I in which R11, R12, and L1-6 have the meanings indicated in Claim 1, is described. Also described is the use thereof for an active-matrix display based on the ECB, PALC, FFS or IPS effect.
    Type: Grant
    Filed: May 22, 2006
    Date of Patent: September 16, 2008
    Assignee: Merck Patent GmbH
    Inventors: Melanie Klasen-Memmer, Matthias Bremer, Elvira Montenegro
  • Cyclobutane and Spiro[3.3]Heptane Compounds
    Publication number: 20080206490
    Abstract: The present invention relates to cyclobutane and spiro[3.3]heptane compounds, to a process for the preparation thereof, to the use thereof as components in liquid-crystalline media, and to electro-optical display elements which contain these liquid-crystalline media.
    Type: Application
    Filed: August 16, 2006
    Publication date: August 28, 2008
    Inventors: Volker Reiffenrath, Matthias Bremer, Melanie Klasen-Memmer
  • Hexahydrodibenzofuran derivatives
    Patent number: 7417157
    Abstract: Disclosed are hexahydrodibenzofuran compounds of formula I, the preparation thereof, 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: April 24, 2007
    Date of Patent: August 26, 2008
    Assignee: Merck Patent Gesellschaft mit Beschrankter Haftung
    Inventors: Axel Jansen, Andreas Taugerbeck, Melanie Klasen-Memmer
  • LIQUID-CRYSTALLINE MEDIUM
    Publication number: 20080197319
    Abstract: Disclosed are a liquid-crystalline medium based on a mixture of polar compounds, which contains at least one compound of formula I and the use thereof for an active-matrix display based on the ECB, FFS, PALC or IPS effect.
    Type: Application
    Filed: February 19, 2008
    Publication date: August 21, 2008
    Inventors: Melanie KLASEN-MEMMER, Matthias Bremer, Izumi Saito
  • Liquid-crystalline medium
    Publication number: 20080191167
    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: Application
    Filed: February 13, 2008
    Publication date: August 14, 2008
    Inventors: Melanie Klasen-Memmer, Matthias Bremer
  • Liquid-Crystal Medium
    Publication number: 20080193681
    Abstract: The invention relates to a liquid-crystalline medium based on a mixture of polar compounds which comprises at least one compound of the formula I in which R11, R12, A1, A2, Z1, Z2, m and n have the meanings indicated in claim 1, and to the use thereof for an active-matrix display based on the ECB, PALC or IPS effect.
    Type: Application
    Filed: March 8, 2006
    Publication date: August 14, 2008
    Inventors: Melanie Klasen-Memmer, Matthias Bremer, Detlef Pauluth, Barbara Hornung, Wolfgang Schmidt, Rainer Wingen
  • FUROCHROMAN DERIVATIVES
    Publication number: 20080177095
    Abstract: Disclosed are furochroman compounds of formula I liquid-crystal media which contains the compounds of formula I, and the use of the media in electro-optical displays, in particular in VAN LCDs.
    Type: Application
    Filed: December 3, 2007
    Publication date: July 24, 2008
    Inventors: Axel Jansen, Andreas Taugerbeck, Melanie Klasen-Memmer, Georg Bernatz
  • STILBENE DERIVATIVES, LIQUID-CRYSTAL MIXTURES AND ELECTRO-OPTICAL DISPLAYS
    Publication number: 20080149891
    Abstract: Disclosed are fluorostilbene compounds of formula I, liquid-crystal media which comprise these compounds, the use of the media in electro-optical displays, in particular in VAN LCDs, and a process for the preparation of these compounds.
    Type: Application
    Filed: December 10, 2007
    Publication date: June 26, 2008
    Inventors: MELANIE KLASEN-MEMMER, MATTHIAS BREMER, ATSUTAKA MANABE