Patents by Inventor Kerstin Worm

Kerstin Worm 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 ferroelectric derivatives of branched acyclic alpha-chlorocarboxylic acids
    Patent number: 4961876
    Abstract: Liquid crystalline ferroelectric derivatives of branched acyclic alpha-chlorocarboxylic acids of the general formula I ##STR1## wherein n=0 or 1; m=0 or 1, o=0 or 1; p=0 or 1X=--COO--, --OOC--, or --CH.sub.2 --CH.sub.2 --Y=X, --CH.sub.2 --, --N.dbd.N--, or --N.dbd.N(O)--, ##STR2## It was discovered that, by reacting chiral alpha-chlorocarboxylic acids or alpha-chlorocarboxylic acid chlorides or bromides, synthesized from natural alpha-amino acids by reaction with nitric and hydrochloric acids, with appropriate hydroxy compounds directly or in the presence of strongly dehydrating substances, preferably carbodiimides, liquid crystalline ferroelectric substances of the general formula I are formed.The inventive substances by themselves, in mixtures with one another as well as with other liquid crystalline substances or substances which are not liquid crystalline, can form liquid crystalline ferroelectric phases, which make them suitable for use in displays.
    Type: Grant
    Filed: September 15, 1988
    Date of Patent: October 9, 1990
    Assignee: VEB Werk fuer Fernsehelektronik im VEB Kombinat Mikroelektronik
    Inventors: Dietrich Demus, Horst Zaschke, Wolfgang Weissflog, Kristina Mohr, Saskia Kohler, Kerstin Worm