Patents by Inventor Hans-R/u/ diger Murawski

Hans-R/u/ diger Murawski 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).

  • Perhydrophenanthrene derivatives, their preparation, and their use in liquid-crystalline dielectrics and electro-optical display elements
    Patent number: 4434073
    Abstract: Perhydrophenanthrene derivatives of formula I ##STR1## wherein R.sub.1 is alkyl of 1-10 C atoms and R.sub.2 is alkyl, alkoxy or alkanoyloxy each of 1-10 C atoms, H, Br, Cl or CN, have an extremely low optical anisotropy and are particularly suitable as components of liquid-crystalline dielectrics.
    Type: Grant
    Filed: December 8, 1982
    Date of Patent: February 28, 1984
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Wolfgang Sucrow, Hans-R/u/ diger Murawski, Hermann Minas, Horst Stegemeyer