Inventor
ILLIAN GERHARD
DE25 patents
Patents
25 patentsUS5430564AJul 4, 1995
Process for producing ferroelectric liquid-crystal cells with oleophilic additive employing heat and low pressure overlapped a short time
HOECHST AG22 citations92
US5384070AJan 24, 1995
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
HOECHST AG26 citations92
US5257122AOct 26, 1993
Ferroelectric liquid crystal display having gray steps or a continuous gray scale
HOECHST AG24 citations92
US5118538AJun 2, 1992
Electrically conductive polymers and their use as orienting layer in liquid-crystal switching and display elements
HOECHST AG20 citations80
US5702639ADec 30, 1997
Use of complex ligands for ions in ferroelectric liquid-crystal mixtures
HOECHST AG9 citations74
US5407599AApr 18, 1995
Cyclopropylaklyl or -alkenyl or heterocyclic compounds, process for their preparation and their use in liquid-crystalline mixtures
HOECHST AG11 citations73
US5366657ANov 22, 1994
Geminal dimethylalkyl compounds, process for their preparation and their use in liquid-crystalline mixtures
HOECHST AG7 citations73
US5361152ANov 1, 1994
Process for producing ferroelectric liquid-crystal cells
HOECHST AG18 citations73
US5353136AOct 4, 1994
Ferroelectric liquid crystal with positive dielectric anisotropy, chevron structure and grey scale
HOECHST AG9 citations73
US5348684ASep 20, 1994
Organosilylalkyl or organosilylalkenyl compounds, process for preparing them and their use in liquid-crystalline mixtures
HOECHST AG9 citations73
US5231528AJul 27, 1993
Ferroelectric liquid crystal components having high spontaneous polarization and low helical pitch
HOECHST AG12 citations73
US5206751AApr 27, 1993
Process for the production of an impact-resistant liquid crystal switching and display device
HOECHST AG10 citations73
US5695683ADec 9, 1997
Ferroelectric liquid crystal mixture
HOECHST AG10 citations72
US5876628AMar 2, 1999
Compounds for use in liquid-crystal composition
HOECHST AG7 citations71
US5859680AJan 12, 1999
Electrical addressing of ferroelectric liquid-crystal displays
HOECHST AG8 citations71
US5679792AOct 21, 1997
Derivatives of 3-cyclohexylpropionic acid, and the use thereof in ferroelectric liquid-crystal mixtures
HOECHST AG4 citations63
US5378394AJan 3, 1995
Ferroelectric liquid-crystalline mixtures
HOECHST AG3 citations62
US5328638AJul 12, 1994
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
HOECHST AG3 citations62
US5286409AFeb 15, 1994
Liquid-crystalline mixtures, in particular ferroelectric liquid-crystalline mixtures
HOECHST AG3 citations62
US5779935AJul 14, 1998
Ferroelectric liquid crystal mixture
HOECHST AG4 citations61
US5594575AJan 14, 1997
Ferroelectric liquid-crystal systems having three or more chiral additives with different signs of the helical twist in the cholesteric phase
HOECHST AG1 citations52
US5370823ADec 6, 1994
Pyrimidinecyclohexane derivatives, process for their preparation, and their use in liquid-crystalline mixtures
HOECHST AG0 citations52
US5344585ASep 6, 1994
Use of 4-fluoropyrimidine derivatives as component for ferroelectric liquid crystal mixtures
HOECHST AG1 citations52
US5443754AAug 22, 1995
Pyridylpyrimidines, a process for their preparation and their use in liquid-crystalline mixtures
HOECHST AG0 citations41
US5354500AOct 11, 1994
Optically active carboxylic esters of oxygen-containing heterocycles as doping substances in liquid crystal mixtures and liquid crystal mixtures containing them
HOECHST AG0 citations41