Patents by Inventor Dagmar Klement

Dagmar Klement 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).

  • Liquid-crystal medium, and electro-optical display containing the medium
    Publication number: 20020084443
    Abstract: A liquid-crystal medium comprising a) at least one compound of the formula I and b) at least one compound of the formula II 1
    Type: Application
    Filed: March 26, 2001
    Publication date: July 4, 2002
    Applicant: Merck Patent GmbH
    Inventors: Michael Heckmeier, Dagmar Klement, Matthias Bremer
  • Liquid-crystalline medium
    Publication number: 20020027217
    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 1
    Type: Application
    Filed: April 13, 2001
    Publication date: March 7, 2002
    Applicant: Merck Patent Gesellschaft mit Beschrankt Patents
    Inventors: Georg Lussem, Dagmar Klement, Christian Hock, Detlef Pauluth, Matthias Bremer, Joachim Krause
  • Liquid-crystalline medium
    Patent number: 6287648
    Abstract: The invention relates to a liquid-crystalline medium based on a mixture of polar compounds of positive dielectric anisotropy, containing at least one compound of the general formula I in which R1 and R2 are each, independently of one another, an alkyl or alkenyl radical having 1 to 12 carbon atoms which is unsubstituted, monosubstituted by CN or CF3 or at least monosubstituted by halogen, where 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— in such a way that O atoms are not linked directly to one another and u is 1 or 2.
    Type: Grant
    Filed: December 22, 1999
    Date of Patent: September 11, 2001
    Assignee: Merck Patent Gesellschaft Mit
    Inventors: Kazuaki Tarumi, Peer Kirsch, Sabine Schoen, Dagmar Klement
  • Liquid-crystalline medium
    Publication number: 20010010366
    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 1
    Type: Application
    Filed: December 7, 2000
    Publication date: August 2, 2001
    Inventors: Michael Heckmeier, Dagmar Klement, Matthias Bremer
  • Liquid-crystalline medium
    Patent number: 6217953
    Abstract: The invention relates to a liquid-crystalline medium based on a mixture of polar compounds of negative dielectric anisotropy which comprises at least one compound of the formula I1 and/or I2 and at least one compound of the formula I3 in which R11, R12, R2, R3, Z, Q, o, p, t, and u are as defined in claim 1, and the use thereof for an active matrix display based on the ECB effect.
    Type: Grant
    Filed: June 30, 1999
    Date of Patent: April 17, 2001
    Assignee: Merck Patent GmbH
    Inventors: Michael Heckmeier, Matthias Bremer, Dagmar Klement