Patents by Inventor Rudolf Eidenschink

Rudolf Eidenschink 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).

  • Patent number: 8148551
    Abstract: The invention relates to tricyclic aromatics of the general formula I in which A1, A2, A3, A4, Q1-Q2, R1, R2, X1, X2, X3, Z1, Z2, Z3, Z4, q, r, s, t and u have the meaning indicated, and to the use thereof as components of liquid-crystalline media and to an electro-optical display element containing same.
    Type: Grant
    Filed: December 29, 2006
    Date of Patent: April 3, 2012
    Assignee: Merck Patent Gesellschaft MIT Beschraenkter Haftung
    Inventors: Rudolf Eidenschink, Holger Kretzschmann
  • Patent number: 8029696
    Abstract: The invention relates to fused naphthalenes of the general formula I, in which A1, A2, A3, A4, Q1-Q2, G1-G2, R1, R2, X1, X2, X3, X4, X5, Z1, Z2, Z3, Z4, q, r, s and t have the meaning indicated, and to the use thereof as components of liquid-crystalline media and to an electro-optical display element containing them.
    Type: Grant
    Filed: July 4, 2007
    Date of Patent: October 4, 2011
    Assignee: Merck Patent GmbH
    Inventors: Holger Kretzschmann, Rudolf Eidenschink
  • Publication number: 20110086784
    Abstract: A lubricant containing one or more compounds selected from the keto compounds of general formula 1 in which R1, R2 and X have the indicated significance.
    Type: Application
    Filed: November 14, 2008
    Publication date: April 14, 2011
    Inventors: Rudolf Eidenschink, Holger Kretzschmann
  • Publication number: 20100059711
    Abstract: The invention relates to fused naphthalenes of the general formula I, in which A1, A2, A3, A4, Q1-Q2, G1-G2, R1, R2, X1, X2, X3, X4, X5, Z1, Z2, Z3, Z4, q, r, s and t have the meaning indicated, and to the use thereof as components of liquid-crystalline media and to an electro-optical display element containing them.
    Type: Application
    Filed: July 4, 2007
    Publication date: March 11, 2010
    Applicant: MERCK PATENT GESELLSCHAFT MIT BESCHRANKTER HAFTUNG
    Inventors: Holger Kretzschmann, Rudolf Eidenschink
  • Publication number: 20090131689
    Abstract: The invention relates to tricyclic aromatics of the general formula I in which A1, A2, A3, A4, Q1-Q2, R1, R2, X1, X2, X3, Z1, Z2, Z3, Z4, q, r, s, t and u have the meaning indicated, and to the use thereof as components of liquid-crystalline media and to an electro-optical display element containing same.
    Type: Application
    Filed: December 29, 2006
    Publication date: May 21, 2009
    Inventors: Rudolf Eidenschink, Holger Kretzschmann
  • Patent number: 6548462
    Abstract: The invention relates to bisphenyl thiocompounds of formula (I), wherein X1 to X5 independently represent H, Cl, F, OH, SH, R, —OR and —SR, wherein R is an organic radical with 1 to 18 C atoms, which can be an alkyl or alkenyl radical that can also contain —O—, —S— instead of a one to four non-adjacent CH2 groups and that can be substituted once or multiple times by —OH, —SH or halogen, an unsubstituted phenyl, cyclohexyl or cyclohexylmethyl radical or substituted by one or up to three alkyl groups with a total of 1 to 9 C atoms in which a CH2 group may be replaced by —O—, provided that at least 3 of the radicals X1 to X5 are; Y1 to Y5 independently have the meaning cited for X1 to X5 and Z represents an &agr;, &ohgr;-alkylene group with 2 to 18 C atoms in which one to three CH2 groups may be substituted by —O— or —S— and 1,4-cyclohexandimethyl group or a simple bond.
    Type: Grant
    Filed: July 5, 2001
    Date of Patent: April 15, 2003
    Assignee: Nematel Dr. Rudolph Eidenschink
    Inventors: Holger Kretzschmann, Rudolf Eidenschink
  • Patent number: 5866522
    Abstract: A lubricant including a compound of the formula: ##STR1## wherein 4, 5 or 6 of the substituents X.sub.1 to X.sub.6 can be --SR, --SO.sub.2 R or --SOR and the other substituents can be --H, --Cl, --F, --OH, --SH, --R, --OR, --COOR or --OOCR wherein R is independently, at each occurrence, unsubstituted or substituted alkyl, of 1 to 18 carbon atoms, said substitution consisting of fluorine substitution of hydrogen, --O-- substitution of --CH.sub.2 --, --S-- substitution of --CH.sub.2 -- and mixtures thereof, said --O-- and --S-- substitutions being selected so that --O-- atoms are not directly bonded to each other. The invention further includes a method of lubricating with the lubricant.
    Type: Grant
    Filed: March 14, 1997
    Date of Patent: February 2, 1999
    Assignee: Nematel Dr. Rudolf Eidenschink
    Inventors: Rudolf Eidenschink, Holger Kretzschmann
  • Patent number: 5837746
    Abstract: Compounds of the formulaRG--A--INwherein IN is a photoinitiator basic structure A is a spacer group and RG is a functional reactive group can be employed as coreactive photoinitiators for photo-polymerization of systems containing ethylenically unsaturated compounds.
    Type: Grant
    Filed: June 23, 1997
    Date of Patent: November 17, 1998
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Manfred Kohler, Jorg Ohngemach, Eike Poetsch, Rudolf Eidenschink, Gerhard Greber, Dieter Dorsch, Jurgen Gehlhaus, Konrad Dorfner, Hans Ludwig Hirsch
  • Patent number: 5744512
    Abstract: Compounds of the formulaRG--A--INwhereinIN is a photoinitiator basic structureA is a spacer group andRG is a functional reactive group can be employed as coreactive photoinitiators for photopolymerization of systems containing ethylenically unsaturated compounds.
    Type: Grant
    Filed: March 20, 1996
    Date of Patent: April 28, 1998
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Manfred Kohler, Jorg Ohngemach, Eike Poetsch, Rudolf Eidenschink, Gerhard Greber, Dieter Dorsch, Jurgen Gehlhaus, Konrad Dorfner, Hans Ludwig Hirsch
  • Patent number: 5729320
    Abstract: Closely packed small particles dispersed in a liquid crystalline phase, whereby the particles can be moved toward one another by external influence, constitute a liquid crystalline medium permitting the generation of bistable images without the requirement of matching the indices of refraction of the components.
    Type: Grant
    Filed: December 19, 1994
    Date of Patent: March 17, 1998
    Assignee: Rudolf Eidenschink
    Inventors: Rudolf Eidenschink, Britta Nagel
  • Patent number: 5571449
    Abstract: Partially fluorinated benzene derivatives of the formula I ##STR1## in which R, A.sup.1, A.sup.2, Z.sup.1, Z.sup.2, L.sup.1, L.sup.2 and m are as defined in claim 1, are suitable as components of liquid-crystalline media.
    Type: Grant
    Filed: January 19, 1995
    Date of Patent: November 5, 1996
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Ekkehard Bartmann, Herbert Plach, Rudolf Eidenschink
  • Patent number: 5532112
    Abstract: Compounds of the formulaRG--A--INwhereinIN is a photoinitiator basic structureA is a spacer group andRG is a functional reactive groupcan be employed as coreactive photoinitiators for photopolymerization of systems containing ethylenically unsaturated compounds.
    Type: Grant
    Filed: June 2, 1994
    Date of Patent: July 2, 1996
    Assignee: Ciba-Geigy Corporation
    Inventors: Manfred Kohler, Jorg Ohngemach, Eike Poetsch, Rudolf Eidenschink, Gerhard Greber, Dieter Dorsch, Jurgen Gehlhaus, Konrad Dorfner, Hans L. Hirsch
  • Patent number: 5532952
    Abstract: A selectively alterable optical data memory (10) has a liquid crystal display (12) with a nematic medium (22), which consists of a nematic phase and a solid dispersed in it, a first voltage source (26), a second voltage source (30) and a modulable laser (32). With the first voltage source (26), the entire display can be converted into the homeotropic state by producing a forming voltage. With the laser (32), an orientation pattern can be produced in display 12 that can be erased or altered at least partially by the application of the threshold voltage and simultaneous irradiation with the laser (32).
    Type: Grant
    Filed: December 12, 1994
    Date of Patent: July 2, 1996
    Assignee: NEMATEL Dr, R. Eidenshink
    Inventors: Markus Kreuzer, Rudolf Eidenschink
  • Patent number: 5403512
    Abstract: Vinyl compounds of the formula I ##STR1## in which the variables are as described in the claims. The compounds are useful as components in liquid-crystalline media.
    Type: Grant
    Filed: August 5, 1992
    Date of Patent: April 4, 1995
    Assignee: Merck Patent Gesellschaft Mit Beschrankter Haftung
    Inventors: Ekkehard Bartmann, Herbert Plach, Rudolf Eidenschink, Volker Reiffenrath, Detlef Pauluth, Eike Poetsch, Sabine Schoen, Volker Meyer, Michael Junge, Reinhard Hittich
  • Patent number: 5389290
    Abstract: Optically active nitrogen-containing heterocycles of the formula I according to claim 1 are suitable as components for ferroelectric liquid crystalline materials.
    Type: Grant
    Filed: December 17, 1991
    Date of Patent: February 14, 1995
    Assignee: Merck Patent Gesellschaft mit Beschrankter Haftung
    Inventors: Joachim Krause, Rudolf Eidenschink, Klaus Bofinger, Reinhard Hopf, Volker Reiffenrath, Eike Poetsch, Bernhard Scheuble, Thomas Geelhaar
  • Patent number: 5348677
    Abstract: The invention relates to an electro-optical liquid crystal display element containing a dielectric with at least two liquid-crystalline components, wherein the dielectric, for shortening the switching times, contains at least one fluorine-containing compound of the formula IR.sup.1 --(A.sup.1 --Z.sup.1).sub.m --A.sup.2 --R.sup.2 Iwherein the radicals R.sup.1, R.sup.2, A.sup.1, A.sup.2, Z.sup.1 and m have the meaning given in claim 1.
    Type: Grant
    Filed: October 20, 1992
    Date of Patent: September 20, 1994
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Eike Poetsch, Hans A. Kurmeier, Rudolf Eidenschink, Georg Weber, Andreas Wachtler
  • Patent number: 5326495
    Abstract: Novel tetrasubstituted methane derivatives of the general formula C[--Sp--M--R].sub.4 in which the radicals --Sp--M--R are the same or different, in which Sp is a spacer group selected from an alkylene or alkenylene radical which is unsubstituted or monosubstituted by halogen, --CN or --CF.sub.3 or one or two non-adjacent CH.sub.2 groups may be replaced by --O--, --CO--, --COO--, --OOC--, --CONH-- or --OCOO--, or is a single bond; R is selected from hydrogen, halogen, --CN, --CF.sub.3, --OCF.sub.3, --NO.sub.2, --N(CH.sub.3).sub.2, an alkyl or alkenyl radical which is unsubstituted or monosubstituted or polysubstituted by --CN, --NH.sub.2, --CF.sub.3 or halogen and in which one or more non-adjacent CH.sub.2 groups may be replaced by the radicals --O--, --CO--, --OOC--, --COO-- or OCOO--; and M is a mesogenic group. Due to their liquid crystal properties, the novel compounds are eminently suitable for use in liquid crystalline media.
    Type: Grant
    Filed: October 8, 1992
    Date of Patent: July 5, 1994
    Assignee: Consortium fur elektrochemische Industrie GmbH
    Inventor: Rudolf Eidenschink
  • Patent number: 5318721
    Abstract: The invention relates to the use of trifluorotoluene derivatives of the formula I ##STR1## in which R.sup.1 is alkyl having 1 to 12 carbon atoms in which, in addition, one or more non-neighboring CH.sub.2 groups may be replaced by --O--, --CO--, --O--CO--, --CO--O--, --O--CO--O--, --CH-halogen, --CH--CN-- and/or --CH.dbd.CH--,A.sup.1 and A.sup.2, in each case independently of one another, are 1,4-phenylene in which, in addition, one or more CH groups may be replaced by N, trans-1,4-cyclohexylene in which, in addition, one or two non-neighboring CH.sub.2 groups may be replaced by --O-- and/or --S--, or 1,4-bicyclo(2,2,2)octylene, each of which is unsubstituted or monosubstituted or polysubstituted by halogen, nitrile and/or CH.sub.3,Z.sup.1 and Z.sup.2, in each case independently of one another, are --CO--O--, --O--CO--, --CH.sub.2 O--, --OCH.sub.2 --, --CH.sub.2 CH.sub.2 -- or a single bond, andn is 0 or 1,as components of chiral tilted smectic phases.
    Type: Grant
    Filed: August 4, 1989
    Date of Patent: June 7, 1994
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Volker Reiffenrath, Joachim Krause, Thomas Geelhaar, Rudolf Eidenschink, Hans-Adolf Kurmeier, Eike Poetsch, Bernhard Scheuble, Georg Weber
  • Patent number: 5288427
    Abstract: Compounds of the formula IR.sup.1 --A.sup.1 --Z.sup.1 --A--O--R.sup.2in whichR.sup.1 and R.sup.2, independently of one another, are each alkyl having 1 to 9 C atoms, in which, in addition, one or two CH.sub.2 groups may be replaced by --O--, --CO--, --O--CO--, --CO--O-- and/or --CH.dbd.CH--, where two O atoms are not linked directly to one anther, or one of the two groups R.sup.1 and R.sup.2 is alternatively H,Z.sup.1 is --CH.sub.2 --O--, --OCH.sub.2 --, --CH.sub.2 CH.sub.2 -- or a single bond,A.sup.1 is trans-1,4-cyclohexylene in which, in addition one or two nonadjacent CH.sub.2 groups may be replaced by O and/or S, or 1,4-cyclohexenylene, andA is unsubstituted or fluorine-substituted 1,4-phenylene, can be used as components of liquid-crystalline dielectrics containing at least three liquid-crystalline compounds for shortening the switch-on time T.sub.
    Type: Grant
    Filed: December 24, 1991
    Date of Patent: February 22, 1994
    Assignee: Merck Patent Gesellschaft mit Beschrankter Haftung
    Inventors: Georg Weber, Bernhard Scheuble, Rudolf Eidenschink, Andreas Wachtler
  • Patent number: 5279762
    Abstract: Compounds of the formula IR.sup.1 --A.sup.1 --A.sup.2 --R.sup.2 IwhereinR.sup.1 and R.sup.2 are each alkyl with 1-15 C atoms, and wherein one or two non-adjacent CH.sub.2 groups can also be replaced by --O--, --S--, --CO--, --O--CO--, --CO--O--, --CO--S--, --S--CO--, --CHHalogen--, --CHCN-- and/or --CH.dbd.CH--,A.sup.1 is 1,4-phenylene, trans-1,4-cyclohexylene or a single bond andA.sup.2 is ##STR1## in which Z is --O--CO--, --CO--O--, --S--CO--, --CO--S--, CH.sub.2 O--, --OCH.sub.2 -- or --CH.sub.2 CH.sub.2 --, with the proviso that, if A.sup.1 is a single bond, A.sup.2 is ##STR2## are suitable as components of chirally tilted smectic liquid crystal phases.
    Type: Grant
    Filed: August 16, 1991
    Date of Patent: January 18, 1994
    Assignee: Merck Patent Gesellschaft Mit Beschrankter Haftung
    Inventors: Reinhard Hopf, Bernhard Scheuble, Reinhard Hittich, Joachim Krause, Volker Reiffenrath, Eike Poetsch, Thomas Geelhaar, Rudolf Eidenschink