Patents by Inventor Michael Brekner

Michael Brekner 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).

  • Use of polyaryl ether ketones as alignment layers
    Patent number: 5166304
    Abstract: Use of polyaryl ether ketones comprising structural units --O--A--O--B-- gives alignment layers for liquid-crystal display and switching devices which have high transparency, low water absorption capacity and particularly uniform alignment both of smectic and of nematic liquid crystals, and thus produce a high contrast capability.
    Type: Grant
    Filed: January 23, 1991
    Date of Patent: November 24, 1992
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Hans-Rolf Dubal, Mikio Murakami, Hans-Otto Drotloff, Michael Brekner