Patents by Inventor Yasuyoshi Namiki

Yasuyoshi Namiki 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 crystalline medium
    Patent number: 6506462
    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 in which R, Y and L1 are as defined therein.
    Type: Grant
    Filed: January 30, 1998
    Date of Patent: January 14, 2003
    Assignee: Merck Patent Gesellschaft mit Beschrankter Haftung
    Inventors: Kazuaki Tarumi, Brigitte Schuler, Michael Schwarz, Hideo Ichinose, Yasuyoshi Namiki, Akiko Takashima, Hiroshi Numata
  • Liquid-crystalline medium
    Patent number: 6406761
    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 in which R, Y and L1 are as defined in claim 1.
    Type: Grant
    Filed: July 26, 2000
    Date of Patent: June 18, 2002
    Assignee: Merck Patents Gesellschaft mit beschraenkter Haftung
    Inventors: Kazuaki Tarumi, Brigitte Schuler, Michael Schwarz, Hideo Ichinose, Yasuyoshi Namiki, Akiko Takashima, Hiroshi Numata
  • Liquid-crystalline medium
    Patent number: 6066268
    Abstract: The invention relates to a liquid-crystalline medium based on a mixture of polar compounds having negative dielectric anisotropy, which contains at least one compound of formula I ##STR1## and at least one compound of formula II ##STR2## wherein R.sup.1 is alkyl or alkoxy with 1 to 8 C atoms or alkenyl with 2 to 7 C atoms,R.sup.2 is alkenyl with 2 to 7 C atoms,R.sup.3 and R.sup.4 are each independently alkyl or alkoxy with 1 to 8 C atoms, ##STR3## m is 0 or 1.
    Type: Grant
    Filed: August 28, 1998
    Date of Patent: May 23, 2000
    Assignee: Merck Patent Gesellschaft Mit Beschrankter Haftung
    Inventors: Hideo Ichinose, Yuka Ikedo, Yasuyoshi Namiki, Shinji Nakajima, Akiko Takashima, Kazuaki Tarumi, Brigitte Schuler, Volker Reiffenrath