Patents by Inventor Annelore Madicke

Annelore Madicke 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, 2,5-disubstituted, 1,3,4-thiadiazoles with extended smectic C phases
    Patent number: 4952699
    Abstract: 2,5-substituted 1,3,4-thiadiazoles of the general formula ##STR1##The aforementioned compounds are used in amounts of 0.1 to 80 mole percent in mixtures for electrooptical arrangements for the modulation of transmitted and reflected light, as well as for the colored or black-and-white display of numerals, symbols and moving or still pictures. The compounds endow the liquid-crystalline mixtures with an extended phase field of the smectic C phase, negative dielectric anisotropy and the property of forming optically active C phases upon admixture with optically active compounds.
    Type: Grant
    Filed: June 20, 1988
    Date of Patent: August 28, 1990
    Assignee: VEB Werk fuer Fernsehelektronik im VEB Kombinat Mikroelektronik
    Inventors: Bak G Yong, Dietrich Demus, Horst Kresse, Annelore Madicke, Gerhard Pelzl, Wolfgang Schafer, Carsten Tschierske, Horst Zaschke