Patents by Inventor Hans A. Kurmeier
Hans A. Kurmeier 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).
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Publication number: 20070275182Abstract: 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: ApplicationFiled: December 18, 2006Publication date: November 29, 2007Inventors: Georg Weber, Ludwig Pohl, Reinhard Hittich, Herbert Plach, Bernhard Scheuble, Takamasa Oyama, Bernhard Rieger, Hans Kurmeier, Ekkehard Bartmann
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Publication number: 20050196551Abstract: 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: ApplicationFiled: March 17, 2005Publication date: September 8, 2005Inventors: Georg Weber, Ludwig Pohl, Reinhard Hittich, Herbert Plach, Bernhard Scheuble, Takamasa Oyama, Bernhard Rieger, Hans Kurmeier, Ekkehard Bartmann
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Patent number: 5536442Abstract: The invention relates to liquid crystal compounds having a terminal structure in accordance with formula 1, 2, 3 or 4:--A.sup.3 --OCF.sub.3 1--A.sup.2 --Q--CHF.sub.2 2--3,5-difluoro-1,4-phenylene-X.sup.1 3--3-fluoro-1,4-phenylene-X.sup.2 4wherein A.sup.2, A.sup.3, X.sup.1 and X.sup.2 and are defined herein. The invention further relates liquid crystal phases containing the above components as well as electrooptical displays containing same.Type: GrantFiled: July 6, 1992Date of Patent: July 16, 1996Assignee: Merck Patent Gesellschaft Mit Beschrankter HaftungInventors: Volker Reiffenrath, Hans A. Kurmeier, Eike Poetsch, Herbert Plach, Ulrich Finkenzeller, Ekkehard Bartmann, Joachim Krause, Bernhard Scheuble, Dieter Dorsch, Georg Weber
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Patent number: 5519525Abstract: 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: GrantFiled: November 15, 1993Date of Patent: May 21, 1996Assignee: Merck Patent Gesellschaft Mit Beschrankter HaftungInventors: Georg Weber, Ludwig Pohl, Reinhard Hittich, Herbert Plach, Bernhard Scheuble, Takamasa Oyama, Bernhard Rieger, Hans A. Kurmeier, Ekkehard Bartmann
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Patent number: 5496499Abstract: Biphenylylethanes of the formula I ##STR1## in which one of the radicals R.sup.1 and R.sup.2 is X and the other radical R.sup.1 or R.sup.2 is R--Y-- whereX is H, halogen, --CF.sub.3, --OCHF.sub.2, --OCF.sub.3, --CN, --NCS or --NO.sub.2,R is alkyl, fluoroalkyl, alkenyl or oxaalkyl andY is O, S, --CO--O--, --O--CO--, --O--CO--O--, a single bond or--in the case where m=1--alternatively trans-1,4-cyclohexylene or ##STR2## m is 1 or 2, Ph is in each case identical or different radicals selected from the group comprising 1,4-phenylene, 2-fluoro-1,4-phenylene, 3-fluoro-1,4-phenylene and 3,5-difluoro-1,4-phenylene,L.sup.3 and L.sup.4 are each H, or one of these radicals is alternatively F,L.sup.1, L.sup.2and L.sup.5 are each H or F, with the proviso that in the case where X=CN or R.sup.1 =--NCS, Y is trans-1,4-cyclohexylene or ##STR3## and/or m=2 and/or one of the radicals L.sup.1, L.sup.2 and L.sup.Type: GrantFiled: January 12, 1994Date of Patent: March 5, 1996Assignee: Merck Patent Gesellschaft mit beschrankter HaftungInventors: Eike Poetsch, Volker Meyer, Klaus P. Stahl, Volker Reiffenrath, Ulrich Finkenzeller, Ekkehard Bartmann, Reinhard Hittich, David Coates, Simon Greenfield, Graham Smith, Hans A. Kurmeier, Dieter Dorsch
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Patent number: 5487845Abstract: Fluorobenzene derivatives of the formula I, ##STR1## R, A1, A2, S1, 22, L, m, Y, Q are as defined herein.Type: GrantFiled: April 12, 1994Date of Patent: January 30, 1996Assignee: Merck Patent Gesellschaft Mit Beschrankter HaftungInventors: Volker Reiffenrath, Hans A. Kurmeier, Eike Poetsch, Herbert Plach, Ulrich Finkenzeller, Ekkehard Bartmann, Joachim Krause, Bernhard Scheuble
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Patent number: 5397505Abstract: The invention relates to a liquid-crystalline medium based on a mixture of polar compounds having positive dielectric anisotropy, characterized in that it contains one or more compounds of the general formula I ##STR1## in which r is o or 1, Q.sup.1 is --CH.sub.2 CH.sub.2 -- or a single bond, A is 1,4-phenylene or trans-1,4-cyclohexylene, L is H or F, R is alkyl, alkoxy, oxaalkyl, fluoroalkyl or alkenyl, in each case having up to 7 carbon atoms and X is F, CF.sub.3, or OCF.sub.2 H.Type: GrantFiled: January 18, 1994Date of Patent: March 14, 1995Assignee: Merck Patent Gesellschaft mit beschrankter HaftungInventors: Bernhard Rieger, Hiroki Yoshitake, Thomas Jacob, Herbert Plach, Ulrich Finkenzeller, Hans A. Kurmeier
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Patent number: 5389292Abstract: Compounds of the formula IR--(A.sup.1 -A.sup.1).sub.m --A.sup.2 --Q--CHF.sub.2 Iin which R, A.sup.1, Z.sup.1, m, A.sup.2 and Q have the meaning given in Patent Claim 1 are suitable as components of liquid-crystalline media.Type: GrantFiled: March 9, 1992Date of Patent: February 14, 1995Assignee: Merck Patent Gesellschaft Mit Beschrankter HaftungInventors: Dieter Dorsch, Ekkehard Bartmann, Hans A. Kurmeier, Ulrich Finkenzeller, Georg Weber, Herbert Plach, Eike Poetsch
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Patent number: 5389289Abstract: The invention relates to a liquid-crystalline medium essentially comprisinga) 5-65% by weight of a component A, comprising two or more compounds selected from group A: ##STR1## b) 20-95% by weight of a component B comprising two or more compounds selected from group B: ##STR2## and c) 0-40% by weight of a component C, comprising one or more compounds having a clearing point above 170.degree. C., where R, X and Y each, independently of one another, have the following meanings:R is in each case alkyl, oxaalkyl, haloalkyl or alkenyl having up to 7 carbon atoms,X is F, Cl, CHF.sub.2, CF.sub.3, OCHF.sub.2 or OCF.sub.3, andY is H, F or Cl.Type: GrantFiled: February 24, 1994Date of Patent: February 14, 1995Assignee: Merck Patent Gesellschaft mit beschrankter HaftungInventors: Bernhard Rieger, Hans A. Kurmeier, Eike Poetsch, Herbert Plach, Ekkehard Bartmann
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Patent number: 5387369Abstract: Supertwist liquid crystal displays having very short switching times are obtained if the nematic liquid crystal mixture contains at least one component chosen from group A consisting of compounds of the formulae AI to AVI: ##STR1## wherein R.sup.1 and R.sup.2 in each case independently of one another are each R and R is alkyl having 1-12 C atoms, wherein one or two non-adjacent CH.sub.2 groups can also be replaced by --O--, --CH.dbd.CH--, --CO--, --O--CO-- or --CO--O--, and up to four other components.Type: GrantFiled: December 29, 1992Date of Patent: February 7, 1995Assignee: Merck Patent Gesellschaft mit beschrankter HaftungInventors: Georg Weber, Herbert Plach, Takamasa Oyama, Hiroki Yoshitake, Bernhard Scheuble, Reinhard Hittich, Hans A. Kurmeier, Eike Poetsch, Klaus P. Stahl
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Patent number: 5378395Abstract: 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: GrantFiled: April 10, 1992Date of Patent: January 3, 1995Assignee: Merck Patent Gesellschaft mit Beschrankter HaftungInventors: Georg Weber, Ludwig Pohl, Reinhard Hittich, Herbert Plach, Bernhard Scheuble, Takamasa Oyama, Bernhard Rieger, Hans A. Kurmeier, Ekkehard Bartmann
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Patent number: 5348677Abstract: 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: GrantFiled: October 20, 1992Date of Patent: September 20, 1994Assignee: Merck Patent Gesellschaft mit beschrankter HaftungInventors: Eike Poetsch, Hans A. Kurmeier, Rudolf Eidenschink, Georg Weber, Andreas Wachtler
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Patent number: 5292454Abstract: Trifluorotoluene compounds of the formula I ##STR1## in which n is 1 to 12, and Q is ##STR2## are suitable as components of liquid-crystalline media.Type: GrantFiled: April 9, 1992Date of Patent: March 8, 1994Assignee: Merck Patent Gesellschaft mit beschrankter HaftungInventors: Hans A. Kurmeier, Reinhard Hittich, Eike Poetsch, Volker Meyer, Herbert Plach, David Coates
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Patent number: 5286411Abstract: The invention relates to a liquid-crystalline medium based on a mixture of polar compounds of positive dielectric anisotropy, characterized in that it contains one or more compounds of the general formula I ##STR1## in which L is H or F, X is F, Cl, CF.sub.3, OCF.sub.3 or OCHF.sub.2, and R is alkyl, oxaalkyl, fluoroalkyl or alkenyl, in each case having up to 7 carbon atoms.Type: GrantFiled: June 5, 1991Date of Patent: February 15, 1994Assignee: Merck Patent Gesellschaft mit beschrankter HaftungInventors: Bernhard Rieger, Reinhard Hittich, Volker Reiffenrath, David Coates, Hans A. Kurmeier, Herbert Plach
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Patent number: 5196140Abstract: 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: GrantFiled: December 23, 1988Date of Patent: March 23, 1993Assignee: Merck Patent Gesellschaft Mit Beschrankter HaftungInventors: Eike Poetsch, Hans A. Kurmeier, Rudolf Eidenschink, Georg Weber, Andreas Wachtler
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Patent number: 5164114Abstract: Ethyne derivatives of the formula IR.sup.1 --(A.sup.1 --Z.sup.1).sub.m --A.sup.3 --C.tbd.C--A.sup.4 --(Z.sup.2 --A.sup.2).sub.n --R.sup.2 Iwherein R.sup.1, A.sup.1, Z.sup.1, m, A.sup.3, A.sup.4, .sub.2 Z.sup.2 and n have the meaning given in Claim 1 and R.sup.2 is --OCF.sub.3, --OC.sub.2 F.sub.4 H or --OC.sub.2 F.sub.5, are suitable as components of liquid crystal phases.Type: GrantFiled: November 25, 1988Date of Patent: November 17, 1992Assignee: Merck Patent Gesellschaft Mit Beschraenkter HaftungInventors: Hans A. Kurmeier, Volker Reiffenrath, Eike Poetsch, Joachim Krause, Georg Weber
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Patent number: 5122295Abstract: 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: GrantFiled: January 5, 1990Date of Patent: June 16, 1992Assignee: Merck Patent Gesellschaft mit beschrankter HaftungInventors: Georg Weber, Ludwig Pohl, Reinhard Hittich, Herbert Plach, Bernhard Scheuble, Takamasa Oyama, Bernhard Rieger, Hans Kurmeier, Ekkehard Bartmann
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Patent number: 4911863Abstract: The invention relates to ferroelectric smectic liquid crystal mixtures and compounds. The invention also relates to electro-optical devices incorporating these mixtures.Type: GrantFiled: December 21, 1987Date of Patent: March 27, 1990Assignee: The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern IrelandInventors: Ian C. Sage, John A. Jenner, Hans A. Kurmeier, Pauluth Detlef, Claus Escher, Eike Poetsch
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Patent number: 4846998Abstract: Cyclohexane derivatives of the formula IR.sup.1 --A.sup.1 --Z.sup.1 --A.sup.2 --R.sup.2 Iin whichR.sup.1 and R.sup.2 are each an alkyl group having 1-10 C atoms, in which one or two non-adjacent CH.sub.2 groups can also be replaced by O atoms and/or --CO-- groups and/or --CO--O-- groups and/or --CH.dbd.CH-- groups, one of the radicals R.sup.1 and R.sup.2 also being H, F, Cl, Br, CN or R.sup.3 --A.sup.3 --Z.sup.2 --,A.sup.1 is --A--, A.sup.4 --A-- or --A--A.sup.4 --,A is a trans-1,4-cyclohexylene group which can be substituted in the 2-, 3-, 5- and/or 6-position one or more times by F and/or Cl and/or Br and/or CN and/or an alkyl group or a fluorinated alkyl group which each have 1-10 C atoms and in which one or two non-adjacent CH.sub.2 groups can also be replaced by 0 atoms and/or --CO-- groups and/or --CO--O-- groups, and which may also be substituted in the 1- and/or 4-position,A.sup.2, A.sup.3 and A.sup.Type: GrantFiled: November 21, 1986Date of Patent: July 11, 1989Assignee: Merck Patent Gesellschaft Mit Beschrankter HaftungInventors: Ludwig Pohl, Bernhard Scheuble, Reinhard Hittich, Rudolf Eidenschink, Hans A. Kurmeier, Andreas Wachtler
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Patent number: 4699636Abstract: Liquid-crystalline materials can be outgassed by thermal treatment under reduced pressure in a thin-layer evaporator or with additional ultrasonic treatment.Type: GrantFiled: February 14, 1986Date of Patent: October 13, 1987Assignee: Merck Patent Gesellschaft mit beschrankter HaftungInventors: Klaus Bofinger, Hans A. Kurmeier, Michael Romer, Jurgen Seubert