Patents by Inventor Ute Boettger

Ute Boettger 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 crystal dihydrophenanthrene substances
    Patent number: 4421670
    Abstract: This invention relates to new liquid crystal dihydrophenanthrene substances for utilization in electro-optical devices for the modulation of light as well as the representation of numerals, signs and images. It has been found that new liquid-crystal 7-n-alkyl-8, 10-dihydrophenanthrene-2-carboxylic acid esters of the general formula ##STR1## alone, in mixture with each other and/or in mixtures with other liquid crystal or non liquid crystal substances, yield good results when they are used in electro-optical components.
    Type: Grant
    Filed: September 14, 1981
    Date of Patent: December 20, 1983
    Assignee: VEB Werk fur Fernsehelektronik Berlin im VEB Kombinat Mikroelektronik
    Inventors: Hans-Joachim Deutscher, Sabine Richter, Horst Zaschke, Dietrich Demus, Ute Boettger