Patents by Inventor Ralf Streinstrasser

Ralf Streinstrasser 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 materials of reduced viscosity
    Patent number: 4118335
    Abstract: Biphenyl derivatives of the formula ##STR1## wherein R.sub.1 and R.sub.2 are the same or different and are straight-chain alkyl of 2 - 12 carbon atoms and collectively have at least 5 carbon atoms, are added to known liquid crystalline materials to significantly lower the viscosity thereof.
    Type: Grant
    Filed: October 8, 1976
    Date of Patent: October 3, 1978
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Joachim Krause, Ralf Streinstrasser, Ludwig Pohl, Fernando Del Pino, Georg Weber