Issued Patents All Time
Showing 26–34 of 34 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5118538 | Electrically conductive polymers and their use as orienting layer in liquid-crystal switching and display elements | Hans-Rolf Dubal, Michael Feldhues, Takamasa Harada, Gerhard Illian, Thomas Mecklenburg +3 more | 1992-06-02 |
| 5071589 | Liquid-crystalline mixtures, in particular ferroelectric liquid-crystalline mixtures | Hans-Rolf Dubal, Wolfgang Hemmerling, Ingrid Muller, Dieter Ohlendorf, Rainer Wingen | 1991-12-10 |
| 4988459 | Use of optically active oxirane-2-carboxylic acid esters as dopants in liquid-crystal mixtures, liquid-crystal mixtures containing same and novel optically active oxirane-2-carboxylic acid esters | Gunter Scherowsky, Jurgen Gay, Hans-Rolf Dubal, Wolfgang Hemmerling, Ingrid Muller +2 more | 1991-01-29 |
| 4927244 | Use of compounds or mixtures of compounds which have a chiral, orthogonal, more highly ordered smectic phase in the range of said phase as switching or indicating medium | Christian Bahr, Gerd Heppke, Detlef Lotzsch, Hans-Rolf Dubal, Dieter Ohlendorf | 1990-05-22 |
| 4911863 | Alkylbyphenyloxyacetic acid esters and their use in smectic liquid crystal materials | Ian C. Sage, John A. Jenner, Hans-Adolf Kurmeier, Pauluth Detlef, Eike Poetsch | 1990-03-27 |
| 4906401 | Use of liquid-crystal 5-phenylpyrimidine derivatives as components of smectic liquid-crystal mixtures | Hans-Rolf Dubal, Wolfgang Hemmerling, Ingrid Muller, Dieter Ohlendorf, Rainer Wingen | 1990-03-06 |
| 4906752 | Liquid-crystal 5-phenylpyrimidine derivatives having sc or sc* phases and a process for preparing them | Ingrid Muller, Hans-Rolf Dubal, Wolfgang Hemmerling, Dieter Ohlendorf, Rainer Wingen | 1990-03-06 |
| 4891151 | Liquid-crystalline phenylpyrimidinyl cyclohexanecarboxylates having a smectic phase, a process for their preparation, and their use in liquid-crystal mixtures | Rainer Wingen, Hans-Rolf Dubal, Wolfgang Hemmerling, Ingrid Muller, Dieter Ohlendorf | 1990-01-02 |
| 4748813 | Method of operating a thermal engine powered by a chemical reaction | John Ross | 1988-06-07 |