Patents Assigned to Merck Patent Gesellschaft Mit Beschraenkter Haftung
  • Liquid-crystalline medium
    Patent number: 6635190
    Abstract: The invention relates to a liquid-crystalline medium based on a mixture of polar compounds having positive dielectric anisotropy, characterized in that it comprises one or more compounds of the general formula I: and simultaneously one or more compounds of the formula IIA: and/or one or more compounds of the formula IIB: in which R, R′, R″, R′″, L and Y are as defined in claim 1.
    Type: Grant
    Filed: July 3, 2001
    Date of Patent: October 21, 2003
    Assignee: Merck Patent Gesellschaft mit beschränkter Haftung
    Inventors: Michael Heckmeier, Sabine Schoen, Detlef Pauluth, Kazuaki Tarumi
  • Tetracyclic and pentacyclic compounds, and their use in liquid-crystalline media
    Patent number: 6635318
    Abstract: Disclosed is a tetracyclic compound of the formula I in which R1, R2 are each, independently of one another, an alkyl or alkenyl radical having up to 15 carbon atoms which is unsubstituted, monosubstituted by CN or CF3, or monosubstituted by halogen. One or more CH2 groups in these radicals may also, in each case independently of one another be replaced by —O—, —S—, —CO—, —CO—O—, —O—CO— or —O—CO—O— such that the O atoms are not linked directly to one another. Z is —OCF2—, —CF2O— or a single bond. L1, L2, L3, and L4 are each, independently of one another, H or F. m is 1 or 2. Similar compounds, as well as liquid-crystalline media having these compounds, are also disclosed.
    Type: Grant
    Filed: August 13, 2001
    Date of Patent: October 21, 2003
    Assignee: Merck Patent Gesellschaft mit beschränkter Haftung
    Inventors: Peer Kirsch, Joachim Krause, Georg Lüssem, Dagmar Klement
  • Pigment mixture
    Patent number: 6632275
    Abstract: The present invention relates to pigment mixtures consisting of at least two components, component A being Sio2 flakes coated with one or more metal oxides and/or metals and component B being special-effect pigments, and to their use in varnishes, paints, printing inks, masterbatches, plastics and cosmetic formulations.
    Type: Grant
    Filed: November 28, 2000
    Date of Patent: October 14, 2003
    Assignee: Merck Patent Gesellschaft mit beschränkter Haftung
    Inventors: Sabine Schoen, Reiner Vogt, Norbert Schül, Karl Osterried, Johann Munz
  • Dialkyne compounds
    Patent number: 6632484
    Abstract: Described are dialkyne compounds of the formula I in which n, m, R1, R2, X1, X2, X3, X4, Z1, Z2, A1, A2, Q, Y1 and Y2 are as defined herein and the use of such compounds in liquid-crystal media.
    Type: Grant
    Filed: July 19, 2001
    Date of Patent: October 14, 2003
    Assignee: Merck Patent Gesellschaft mit beschränkter Haftung
    Inventors: Volker Reiffenrath, Georg Lüssem
  • Colored and coated plateletlike pigments
    Patent number: 6630018
    Abstract: The invention relates to a platelet-shaped pigment having high luster and high covering power or high transparency, consisting of a transparent, inorganic, platelet-shaped matrix which can contain an additional constituent, characterized in that the additional constituent is a soluble or insoluble colorant and in that the matrix is coated at least on one side with one or more thin, transparent or semi-transparent reflective layers of metal oxides or metals to achieve the luster.
    Type: Grant
    Filed: April 15, 1994
    Date of Patent: October 7, 2003
    Assignee: Merck Patent Gesellschaft mit beschränkter Haftung
    Inventors: Gerd Bauer, Karl Osterried, Christoph Schmidt, Reiner Vogt, Helge-Bettina Kniess, Michael Uhlig, Norbert Schül, Günther Brenner
  • Dioxane derivatives, and liquid-crystalline medium
    Patent number: 6620468
    Abstract: The invention relates to novel dioxane derivatives of the formula I R1—(A1—Z1)m—A2—C2F4—A3—(Z2—A4)n—R2  I in which R1, R2, A1, A2, A3, A4, Z1, Z2, m and n are as defined herein, to their use as components of liquid-crystalline media, and to liquid-crystal and electro-optical display elements which contain the liquid-crystalline media according to the invention.
    Type: Grant
    Filed: August 6, 2001
    Date of Patent: September 16, 2003
    Assignee: Merck Patent Gesellschaft mit Beschränkter Haftung
    Inventors: Matthias Bremer, Peer Kirsch, Detlef Pauluth, Sabine Schoen, Kazuaki Tarumi, Georg Lüssem, Michael Heckmeier, Joachim Krause
  • Imidazopyridine derivatives as phosphodiesterase VII inhibitors
    Patent number: 6613778
    Abstract: Compounds of the formula I in which R1 denotes CONR4R5, R2 denotes H or A, R4 and R5, independently of one another, each denote H or A1, R3 denotes Hal, Hal denotes F, Cl, Br or I, A denotes alkyl having 1-4 carbon atoms, A1 denotes alkyl having 1-10 carbon atoms, X denotes alkylene having 1-4 carbon atoms, in which an ethylene group may also be replaced by a double or triple bond, and their physiologically acceptable salts and/or solvates, as phosphodiesterase VII inhibitors, and their use for the preparation of a medicament.
    Type: Grant
    Filed: May 3, 2002
    Date of Patent: September 2, 2003
    Assignee: Merck Patent Gesellschaft mit beschränkter Haftung
    Inventors: Hanse-Michael Eggenweiler, Karl-August Ackermann, Rochust Jonas, Michael Wolf, Michael Gassen, Thomas Welge
  • Process for the preparation of UV filter substances
    Patent number: 6593476
    Abstract: The present invention relates to a preparation process for 2-arylbenzimidazolesulfonic acids of the formula I: Ar is a substituted or unsubstituted phenyl or naphthyl radical and R is a C1-8-alkyl or C1-8-alkoxy radical. n is 1-4, m is 1-3 and o is 0-2. o-phenylenediamine is reacted in the presence of oleum with an arylcarboxylic acid or an arylcarboxylic acid derivative. Compounds prepared in this way can be used as UV filters, and as components in cosmetic compositions.
    Type: Grant
    Filed: June 25, 2001
    Date of Patent: July 15, 2003
    Assignee: Merck Patent Gesellschaft mit beschränkter Haftung
    Inventors: Ulrich Heywang, Michael Schwarz, Frank Pflücker
  • Stable (CF3)2N— salts and process for preparing them
    Patent number: 6582849
    Abstract: The invention relates to stable (CF3)2N− salts, to a process for preparing them and to their use as precursor for organic compounds.
    Type: Grant
    Filed: September 1, 2000
    Date of Patent: June 24, 2003
    Assignee: Merck Patent Gesellschaft mit beschraenkter Haftung
    Inventors: Udo Heider, Michael Schmidt, Peter Sartori, Nikolai Ignatev, Adrji Kucherna
  • Interference pigments
    Patent number: 6579355
    Abstract: The present invention relates to an interference pigment based on multiply-coated platelet-shaped substrates, comprising at least one layer sequence of (A) a high refractive index coating comprising a mixture of TiO2 and Fe2O3 in a ratio of about 10:1 to about 3:1 and optionally one or more metal oxides in amounts of ≲ about 20% by weight based on the layer (A), (B) a colorless coating having a refractive index n ≲ about 1.8, and optionally (C) an outer protective layer.
    Type: Grant
    Filed: February 15, 2000
    Date of Patent: June 17, 2003
    Assignee: Merck Patent Gesellschaft mit Beschraenkter Haftung
    Inventors: Christoph Schmidt, Klaus Bernhardt, Dieter Heinz
  • STN liquid-crystal display
    Patent number: 6569503
    Abstract: The invention relates to supertwist liquid-crystal displays (SLCDs) having very short response times and good steepnesses and angle dependencies, and to the novel nematic liquid-crystal mixtures used therein, which are distinguished in that they comprise at least one compound of the formula IA and at least one compound of the formula IB and/or at least one compound of the formula IC in which Ra, Rb, Rc, Rd, Re, Z, L, q and c have the meaning given.
    Type: Grant
    Filed: May 4, 2000
    Date of Patent: May 27, 2003
    Assignee: Merck Patent Gesellschaft mit Beschränkter Haftung
    Inventors: Harald Hirschmann, Marcus Reuter, Volker Reiffenrath, Sabine Schoen, Clarissa Weller
  • Liquid crystal compounds, liquid crystal medium and liquid crystal display
    Patent number: 6569505
    Abstract: The instant invention relates to liquid crystal media comprising a strongly dielectrically positive component A, preferably comprising isothiocyanate compounds, most preferably compounds of formula I, as given in the text, and a further dielectrically positive component B, preferably comprising terminally polar substituted bi- or terphenyl compounds, most preferably comprising compounds of formula II, as given in the text, further to novel isothiocyanato compounds as well as to liquid crystal displays comprising these media, in particular to PDLC display and most particular to holographic PDLC displays. The instant invention further relates to compounds of formula I wherein the parameters are as as specified in the text.
    Type: Grant
    Filed: February 2, 2001
    Date of Patent: May 27, 2003
    Assignee: Merck Patent Gesellschaft mit Beschränkter Haftung
    Inventors: Eike Poetsch, Atsutaka Manabe, Volker Reiffenrath, Marcus Reuter, Volker Meyer, Joachim Krause, Detlef Pauluth
  • Pigment flakes
    Patent number: 6552102
    Abstract: Described are chiral liquid crystalline polymer materials and polymerizable compounds used for preparing them. The polymer materials can serve as a carrier material or are coated onto a carrier material. Also described are methods of making such materials and using them to make pigment flakes used in paints, printing inks, spray paints, cosmetic products, colored plastics, optical elements and security applications.
    Type: Grant
    Filed: July 3, 2001
    Date of Patent: April 22, 2003
    Assignee: Merck Patent Gesellschaft mit beschränkter Haftung
    Inventors: Eike Poetsch, Gerhard Pfaff, Matthias Kuntz, Stephan Derow, David Coates
  • Pigment preparation
    Patent number: 6547870
    Abstract: The invention relates to a non-dusting, homogeneous pigment preparation, comprising ≧40% by weight of one or more effect pigments, 0.5-60% by weight of a polyalkylene glycol and/or one or more polyalkylene glycol derivatives, 0-10% by weight of a redispersing auxiliary, 0-40% by weight of water or an organic solvent or solvent mixture, 0-40% by weight of at least one further hydroxyl-rich resin, and to its use as a precursor for printing inks.
    Type: Grant
    Filed: December 13, 2000
    Date of Patent: April 15, 2003
    Assignee: Merck Patent Gesellschaft mit beschränkter Haftung
    Inventors: Carsten Griessmann, Gerhard Herget
  • Supertwist liquid-crystal displays and liquid-crystal mixtures therefor
    Patent number: 6544602
    Abstract: The invention relates to supertwist liquid-crystal displays (SLCDs) having very short response times and good steepnesses and angle dependencies, and to the novel nematic liquid-crystal mixtures used therein, which are distinguished in that they comprise at least one compound of the formula IA and at least one compound of the formula IB in which Ra, Rb, Rc, Rd, Y1, Y2, n and p have the meaning given.
    Type: Grant
    Filed: May 4, 2000
    Date of Patent: April 8, 2003
    Assignee: Merck Patent Gesellschaft mit beschränkter Haftung
    Inventors: Harald Hirschmann, Clarissa Weller, Georg Weber, Kazuo Totani, Akihiro Kojima
  • Laser-markable plastics
    Patent number: 6545065
    Abstract: The present invention relates to laser-markable plastics of which a feature is that they include, as absorber material, a mixture of pearl luster pigments and/or non-lustrous metal oxide-coated mica pigments and inorganic platelet-form substrates.
    Type: Grant
    Filed: January 4, 1999
    Date of Patent: April 8, 2003
    Assignee: Merck Patent Gesellschaft mit beschränkter Haftung
    Inventors: Hans-Jürgen Solms, Manfred Kieser
  • Ester compounds and their use in liquid-crystalline media
    Patent number: 6541081
    Abstract: The invention relates to esters of the formula I and to a liquid-crystalline medium based on a mixture of polar compounds having positive dielectric anisotropy, characterized in that it comprises one or more compounds of the general formula I in which R, A1, Z1, L1, L2, Y and n are as defined in herein.
    Type: Grant
    Filed: November 15, 2000
    Date of Patent: April 1, 2003
    Assignee: Merck Patent Gesellschaft mit beschränkter Haftung
    Inventors: Matthias Bremer, Michael Heckmeier, Joachim Krause, Brigitte Schuler, Achim Götz
  • Catalyst system for the Ziegler-Natta polymerization of olefins
    Patent number: 6534606
    Abstract: Described are catalyst systems having aluminium alkyl complexes of the formula (I) described herein applied to magnesium chloride, SiO2 or SiO2 in combination with MgCl2 as support in the presence of titanium halides or vanadium halides and internal and, if desired, external donors act both as cocatalysts and as stereoselectivity promoters in heterogeneous polymerizations of &agr;-olefins. Also described are polymerization methods using these catalyst systems.
    Type: Grant
    Filed: March 8, 2001
    Date of Patent: March 18, 2003
    Assignee: Merck Patent Gesellschaft Mit Beschränkter Haftung
    Inventors: Katrin Köhler, Eike Poetsch, Herbert Schumann, Sebastian Dechert, Walter Kaminsky, Andre Laban, Manfred Arnold, Jana Knorr, Birgit Corinna Wassermann
  • Liquid-crystalline medium
    Patent number: 6514580
    Abstract: The invention relates to a liquid-crystalline medium based on a mixture of polar compounds having negative dielectric anisotropy, characterized in that it comprises one or more compounds of the general formula I in which R1 is an alkoxy group having up to 12 carbon atoms.
    Type: Grant
    Filed: December 7, 2000
    Date of Patent: February 4, 2003
    Assignee: Merck Patent Gesellschaft mit beschränkter Haftung
    Inventors: Michael Heckmeier, Dagmar Klement, Matthias Bremer
  • N-phenylamide and N-pyridylamide derivatives, method of preparing them and pharmaceutical compositions containing them
    Patent number: 6509362
    Abstract: The present invention relates to the compounds of formula (I) in which X, R1, R2 and R3 are as defined in claim 1. These compounds are cholesteryl acyl transferase (ACAT) inhibitors.
    Type: Grant
    Filed: November 1, 2001
    Date of Patent: January 21, 2003
    Assignee: Merck Patent Gesellschaft mit Beschraenkter Haftung
    Inventors: Diedier Festal, Jean Yves Nioche, Guy Augert, Jacques Deserprit