Issued Patents All Time
Showing 1–23 of 23 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5876628 | Compounds for use in liquid-crystal composition | Gerhard Illian, Hubert Schlosser, Thoshiaki Nonaka, Kazuya Nagao, Ayako Takeichi +2 more | 1999-03-02 |
| 5651918 | Optically active 1,3-dioxolane derivatives carrying a mesogenic radical in the 4-position, a process for their preparation and their use as doping agents in liquid-crystal mixtures | Gunter Scherowsky, Jurgen Gay, Rainer Wingen, Hans-Rolf Dubal, Claus Escher +3 more | 1997-07-29 |
| 5641428 | Use of optically active 1,3-dioxolane-4-carboxylates as dopes in liquid-crystal mixtures, liquid-crystal mixtures containing these compounds, and novel optically active 1,3-dioxolane-4-carboxylates | Rainer Wingen, Hans-Rolf Dubal, Claus Escher, Wolfgang Hemmerling, Dieter Ohlendorf | 1997-06-24 |
| 5594575 | Ferroelectric liquid-crystal systems having three or more chiral additives with different signs of the helical twist in the cholesteric phase | Claus Escher, Hans-Rolf Dubal, Takamasa Harada, Wolfgang Hemmerling, Gerhard Illian +3 more | 1997-01-14 |
| 5439612 | Cyclohexylphenylpyrimidines, process for their preparation, and their use in liquid-crystalline mixtures | Gerd Illian, Rainer Wingen | 1995-08-08 |
| 5407599 | Cyclopropylaklyl or -alkenyl or heterocyclic compounds, process for their preparation and their use in liquid-crystalline mixtures | Armin de Meijere, Hans-Rolf Dubal, Claus Escher, Wolfgang Hemmerling, Dieter Ohlendorf +4 more | 1995-04-18 |
| 5384070 | Use of optically active tetrahydrofuran-2-carboxylic acid esters as dopants in liquid-crystal mixtures, liquid-crystal mixtures containing same and novel optically active tetrahydrofuran-2-carboxylic acid esters | Wolfgang Hemmerling, Hans-Rolf Dubal, Claus Escher, Gerhard Illian, Yoshio Inoguchi +3 more | 1995-01-24 |
| 5378394 | Ferroelectric liquid-crystalline mixtures | Hans-Rolf Dubal, Claus Escher, Takamasa Harada, Wolfgang Hemmerling, Gerhard Illian +3 more | 1995-01-03 |
| 5366657 | Geminal dimethylalkyl compounds, process for their preparation and their use in liquid-crystalline mixtures | Gerhard Illian, Takamasa Harada | 1994-11-22 |
| 5354500 | Optically active carboxylic esters of oxygen-containing heterocycles as doping substances in liquid crystal mixtures and liquid crystal mixtures containing them | Wolfgang Hemmerling, Hans-Rolf Dubal, Claus Escher, Gerhard Illian, Mikio Murakami +2 more | 1994-10-11 |
| 5348684 | Organosilylalkyl or organosilylalkenyl compounds, process for preparing them and their use in liquid-crystalline mixtures | Wolfgang Hemmerling, Hans-Rolf Dubal, Claus Escher, Gerhard Illian, Yoshio Inoguchi +3 more | 1994-09-20 |
| 5328638 | Optically active esters of 5-ethyl- and 5-vinyl-1,3-dioxolane-4-carboxylic acid, their use as doping substances in liquid crystal mixtures and the liquid crystal mixtures containing the new esters | Hans-Rolf Dubal, Claus Escher, Wolfgang Hemmerling, Gerhard Illian, Mikio Murakami +2 more | 1994-07-12 |
| 5286409 | Liquid-crystalline mixtures, in particular ferroelectric liquid-crystalline mixtures | Hans-Rolf Dubal, Claus Escher, Takamasa Harada, Wolfgang Hemmerling, Gerhard Illian +3 more | 1994-02-15 |
| 5200521 | Cyclohexylphenylpyrimidines, process for their preparation, and their use in liquid-crystalline mixtures | Gerd Illian, Rainer Wingen | 1993-04-06 |
| 5192377 | Process of producing continuously cast monotectic aluminum-silicon alloy strip and wire | Bruno Prinz, Alberto Romero | 1993-03-09 |
| 5071589 | Liquid-crystalline mixtures, in particular ferroelectric liquid-crystalline mixtures | Hans-Rolf Dubal, Claus Escher, Wolfgang Hemmerling, 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, Claus Escher, Wolfgang Hemmerling +2 more | 1991-01-29 |
| 4985172 | Chiral aryloxypropionates, and the use thereof as dopes in liquid-crystal phases | Rainer Wingen, Hans-Rolf Dubal, Wolfgang Hemmerling, Dieter Ohlendorf | 1991-01-15 |
| 4906401 | Use of liquid-crystal 5-phenylpyrimidine derivatives as components of smectic liquid-crystal mixtures | Hans-Rolf Dubal, Claus Escher, Wolfgang Hemmerling, Dieter Ohlendorf, Rainer Wingen | 1990-03-06 |
| 4906752 | Liquid-crystal 5-phenylpyrimidine derivatives having sc or sc* phases and a process for preparing them | Hans-Rolf Dubal, Claus Escher, 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, Claus Escher, Wolfgang Hemmerling, Dieter Ohlendorf | 1990-01-02 |
| 4876028 | Chiral aryl-2,3-epoxyalkyl-ethers and the corresponding thio compounds thereof, and the use thereof as dopes in liquid-crystal phases | Wolfgang Hemmerling, Hans-Rolf Dubal, Dieter Ohlendorf, Rainer Wingen | 1989-10-24 |
| 4855429 | Chiral esters formed from .alpha.-substituted carboxylic acids and mesogenic hydroxyl compounds, and their use as dopants in liquid-crystalline phases | Gerd Heppke, Christian Bahr, Dieter Ohlendorf, Rainer Wingen | 1989-08-08 |