Patents Represented by Law Firm Curtis, Morris & P C
  • Patent number: 5695683
    Abstract: A ferroelectric liquid crystal mixture which does not lower the conventional transition temperature to the ferroelectric phase (60.degree. C. or above), which maintains the Sa phase within a suitable temperature range, and which is useful for reducing the cone angle is disclosed. The ferroelectric liquid crystal mixture contains at least one of the compounds represented by the following general formula 1 to 3, and exhibits a Sa/Sc phase transition temperature of 60.degree. C. or more and a cone angle of 47 degree or less atsome temperature between 15.degree. C. and 35.degree. C.
    Type: Grant
    Filed: September 29, 1994
    Date of Patent: December 9, 1997
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Ayako Takeichi, Gerhard Illian