Patents Represented by Law Firm Millen, White & Zalano
  • Matrix liquid crystal display
    Patent number: 7445818
    Abstract: The invention relates to a matrix liquid crystal display containing integrated non-linear elements and a liquid crystal mixture which has a particularly high resistivity.
    Type: Grant
    Filed: December 18, 2006
    Date of Patent: November 4, 2008
    Assignee: Merck Patent Gesellschaft Mit Beschrankter Haftung
    Inventors: Georg Weber, Ludwig Pohl, Reinhard Hittich, Herbert Plach, Bernhard Scheuble, Takamasa Oyama, Bernhard Rieger, Hans Adolf Kurmeier, Ekkehard Bartmann
  • Thermal transfer ribbon with end of ribbon markers
    Patent number: 6989180
    Abstract: Thermal transfer ribbons which employ a reflective sensor marker of a small size for detecting the end of the ribbon and also thermal transfer ribbons which employ a reflective sensor marker and a transparent sensor marker for detecting the end of the ribbon.
    Type: Grant
    Filed: October 9, 2003
    Date of Patent: January 24, 2006
    Assignee: NCR Corporation
    Inventors: Mark E. Keeton, Thomas J. Obringer, Richard D. Puckett, Jeffery S. Denton
  • Pentafluorosulfuranylbenzene derivatives
    Patent number: 6630210
    Abstract: The invention relates to pentafluorosulfuranylbenzene derivatives of the formula I in which R1, A1, A2, Z1, L1, L2, L3 and n are as defined herein and to the use thereof in liquid-crystalline media.
    Type: Grant
    Filed: June 27, 2001
    Date of Patent: October 7, 2003
    Assignee: Merck GmbH
    Inventors: Peer Kirsch, Joachim Krause, Michael Heckmeier
  • Optical transducers based on liquid crystalline phases
    Patent number: 6137576
    Abstract: Optical transducers for measuring a contaminant in a gas are disclosed, whereby said contaminant interacts with a liquid crystalline phase as a sensing element in a flow cell. According to the invention nematic crystalline phases on a orientation layer are used. Means are provided to measure or to detect changes of the refractive index of said liquid crystalline phase caused by interaction of said contaminant with said liquid crystalline phase. In preferred embodiments the means for measuring or for detecting the refractive index is a Mach-Zehnder interferometer, a grating coupler, or a device for e.g. visual detection, whereby the flow cell is placed between two linearly polarizing filters, and whereby the two axis of polarization are crossed. Furthermore optical transducers are disclosed, which contain an isotropic dopant in a liquid crystalline phase.
    Type: Grant
    Filed: July 28, 1998
    Date of Patent: October 24, 2000
    Assignee: Merck Patent Gesellschaft mit Beschrankter Haftung
    Inventors: Detlef Pauluth, Joachim Krause, Gunter Gauglitz, Bernd Drapp
  • Liquid-crystalline material
    Patent number: 5538768
    Abstract: The invention relates to a liquid-crystalline material in the form of an anisotropic gel consisting of a polymerized liquid-crystalline material and a low-molecular weight liquid-crystalline material, wherein the polymerized material (a) forms a permanently oriented network in the low-molecular liquid-crystalline material (b), characterized in that the low-molecular weight liquid-crystalline material (b) exhibits a cholesteric phase, and to a display cell with such a material.
    Type: Grant
    Filed: July 1, 1994
    Date of Patent: July 23, 1996
    Assignee: Merck Patent Gesellschaft Mit Beschrankter Haftung
    Inventors: Shirley A. Marden, David Coates
  • Aryl-sulfur pentafluorides
    Patent number: 5055223
    Abstract: Aryl-sulfur pentafluorides of the formula I ##STR1## wherein R, A, Z, n, m and X.degree. have the meaning indicated in claim 1 are suitable for use as components of liquid-crystal phases for field-effect and/or bi-stability effect displays.
    Type: Grant
    Filed: December 27, 1989
    Date of Patent: October 8, 1991
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Volker Reiffenrath, Rudolf Eidenschink, Georg Weber