Patents by Inventor Kirsten Gruneberg

Kirsten Gruneberg 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).

  • Optically active oxirane derivatives, and their use as dopes in liquid-crystal mixtures
    Patent number: 5336436
    Abstract: Optically active oxirane derivatives containing a mesogenic molecular unit are suitable as dopes in liquid-crystal mixtures. They give liquid-crystalline ferroelectric phases having short response times and electroclinic phases having large electroclinic coefficients. A further advantage is that they induce a helix of very small pitch, so that they are also suitable for helix compensation in LC mixtures.
    Type: Grant
    Filed: June 22, 1992
    Date of Patent: August 9, 1994
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Gunter Scherowsky, Kirsten Gruneberg