Patents by Inventor Sven Schuepfer

Sven Schuepfer 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).

  • Polymerisable compounds and the use thereof in liquid-crystal displays
    Patent number: 11299676
    Abstract: The present invention relates to a mixture comprising a not fully aromatic polymerisable compound and a polymerisable photoinitiator, to liquid-crystal (LC) media comprising them, and to the use of the polymerisable compounds and LC media for optical, electro-optical and electronic purposes, in particular in LC displays, especially in LC displays of the polymer sustained alignment type.
    Type: Grant
    Filed: September 26, 2018
    Date of Patent: April 12, 2022
    Assignee: Merck Patent GmbH
    Inventors: Qiong Tong, Dmitry Ushakov, Helga Haas, Steffen Gnauck, Thorsten Rachor, Sven Schuepfer, Simon Mundinger
  • Benzil monoketals and the use thereof
    Patent number: 10899852
    Abstract: The present invention relates to the use of hydrophilic compounds of the formula I as photopolymerisation initiators of polymerisable substance mixtures which comprise unsaturated compounds, or for the photochemical crosslinking of linear polymers, in which the parameters have the meaning indicated in Claim 1, to sealants for liquid-crystal displays which comprise the hydrophilic photoinitiators, to novel hydrophilic photoinitiators of the formula I, and to the liquid-crystal displays produced using these sealants.
    Type: Grant
    Filed: October 5, 2016
    Date of Patent: January 26, 2021
    Assignee: Merck Patent GmbH
    Inventors: Peer Kirsch, Qiong Tong, Alexander Hahn, Leo Weegels, Steffen Gnauck, Sven Schuepfer, Peter Leonhard, Claudia Enders
  • POLYMERISABLE COMPOUNDS AND THE USE THEREOF IN LIQUID-CRYSTAL DISPLAYS
    Publication number: 20200263091
    Abstract: The present invention relates to a mixture comprising a not fully aromatic polymerisabe compound and a polymerisable photoinitiator, to liquid-crystal (LC) media comprising them, and to the use of the polymerisable compounds and LC media for optical, electro-optical and electronic purposes, in particular in LC displays, especially in LC displays of the polymer sustained alignment type.
    Type: Application
    Filed: September 26, 2018
    Publication date: August 20, 2020
    Applicant: Merck Patent GmbH
    Inventors: Qiong TONG, Dmitry USHAKOV, Helga HAAS, Steffen GNAUCK, Thorsten RACHOR, Sven SCHUEPFER, Simon MUNDINGER
  • BENZIL MONOKETALS AND THE USE THEREOF
    Publication number: 20200247916
    Abstract: The present invention relates to the use of hydrophilic compounds of the formula I as photopolymerisation initiators of polymerisable substance mixtures which comprise unsaturated compounds, or for the photochemical crosslinking of linear polymers, in which the parameters have the meaning indicated in Claim 1, to sealants for liquid-crystal displays which comprise the hydrophilic photoinitiators, to novel hydrophilic photoinitiators of the formula I, and to the liquid-crystal displays produced using these sealants.
    Type: Application
    Filed: October 5, 2016
    Publication date: August 6, 2020
    Applicant: Merck Patent GmbH
    Inventors: Peer KIRSCH, Qiong TONG, Alexander HAHN, Leo WEEGELS, Steffen GNAUCK, Sven SCHUEPFER, Peter LEONHARD, Claudia ENDERS
  • Liquid-crystalline mixtures
    Patent number: 7052744
    Abstract: Nematic liquid-crystal mixtures comprising one or more compounds of the formula I in which R1 and R2 are as defined herein, are suitable for use in TN and STN liquid-crystal displays.
    Type: Grant
    Filed: April 7, 2004
    Date of Patent: May 30, 2006
    Assignee: Merck Patent GmbH
    Inventors: Harald Hirschmann, Sven Schuepfer, Renate Graulich, Martina Weidner, Kevin Adlem, Mark John Goulding, Patricia Saxton
  • 1,4-Di-(trans-4-cyclohexyl)benzene derivatives and their use in liquid crystal media and liquid crystal devices
    Patent number: 7041347
    Abstract: Liquid-crystalline media comprising one or more compounds of the formula I in which Ra, Rb, L and r are as defined herein, are suitable for use in, for example, TN and STN liquid crystal displays
    Type: Grant
    Filed: February 13, 2004
    Date of Patent: May 9, 2006
    Assignee: Merck Patent GmbH
    Inventors: Harald Hirschmann, Martina Weidner, Sven Schüpfer, Renate Graulich, Mark John Goulding, Martin Heeney, Warren Duffy
  • Liquid-crystalline mixtures
    Patent number: 6821582
    Abstract: A liquid-crystalline mixture that contains one or more compounds of each of the formulae IA, IB and IC and to the use thereof in TN, STN and IPS displays.
    Type: Grant
    Filed: July 26, 2002
    Date of Patent: November 23, 2004
    Assignee: Merck Patent GmbH
    Inventors: Harald Hirschmann, Volker Reiffenrath, Marcus Reuter, Sabine Schoen, Sven Schüpfer, Clarissa Weller
  • Liquid-crystalline medium
    Patent number: 6808763
    Abstract: The invention relates to a liquid-crystalline medium which is characterized in that it comprises one or more compounds of the formula A and one more compounds of the formula B in which Ra, Rb, Rbb, x and L1 are as defined in claim 1.
    Type: Grant
    Filed: December 20, 2002
    Date of Patent: October 26, 2004
    Assignee: Merck Patent GmbH
    Inventors: Harald Hirschmann, Sven Schüpfer, Martina Weidner, Renate Graulich
  • Liquid-crystalline mixtures
    Publication number: 20040197494
    Abstract: Nematic liquid-crystal mixtures comprising one or more compounds of the formula I 1
    Type: Application
    Filed: April 7, 2004
    Publication date: October 7, 2004
    Inventors: Harald Hirschmann, Sven Schuepfer, Renate Graulich, Martina Weidner, Kevin Adlem, Mark John Goulding, Patricia Saxton
  • 1,4-Di-(trans-4-cyclohexyl)benzene derivatives and their use in liquid crystal media and liquid crystal devices
    Publication number: 20040164276
    Abstract: Liquid-crystalline media comprising one or more compounds of the formula I 1
    Type: Application
    Filed: February 13, 2004
    Publication date: August 26, 2004
    Inventors: Harald Hirschmann, Martina Weidner, Sven Schuepfer, Renate Graulich, Mark John Goulding, Martin Heeney, Warren Duffy
  • Liquid-crystalline medium
    Patent number: 6613401
    Abstract: Liquid-crystalline media comprising one or more compounds of formula A and at least one compound of formula B are suitable for use in TN and STN displays.
    Type: Grant
    Filed: December 6, 2001
    Date of Patent: September 2, 2003
    Assignee: Merck Patent GmbH
    Inventors: Harald Hirschmann, Sven Schüpfer, Renate Graulich, Martina Weidner
  • Nematic liquid-crystal composition
    Patent number: 6497828
    Abstract: The invention relates to nematic liquid-crystal compositions comprising bisalkenyl compounds of the formula Ia. in which R1 and R2, are each independently alkenyl having 2 to 8 carbon atoms, and Z2 is a single bond, —(CH2)2— or trans-CH═CH—. and to their use in plasma-addressed LCDs.
    Type: Grant
    Filed: July 24, 2000
    Date of Patent: December 24, 2002
    Assignee: Merck Patent GmbH
    Inventors: Harald Hirschmann, Sven Schüpfer, Marcus Reuter
  • STN liquid-crystal display
    Patent number: 6183821
    Abstract: Supertwist liquid-crystal displays (SLCDs) with outstanding properties are obtained if the nematic liquid-crystal mixtures used therein comprise one or more compounds of the formula IA and one or more compounds of the formula IB Ra is alkyl, alkoxy, alkenyl or alkenyloxy having 1 to 12 carbon atoms, Rb is alkyl or alkoxy having 1 to 5 carbon atoms, Z is —COO —CH2CH2— or a single bond, and  are each, independently of one another,  and one of the rings  may alternatively be R3 is an alkenyl group having 2 to 7 carbon atoms, R4 is as defined for Ra in the formula IA, and c is 0 or 1.
    Type: Grant
    Filed: November 27, 1998
    Date of Patent: February 6, 2001
    Assignee: Merck Patent Gesellschaft
    Inventors: Harald Hirschmann, Sven Schüpfer, Marcus Reuter, Volker Reiffenrath, Sabine Schoen