Inventor · disambiguated record
Claus Escher
Also filed as: ESCHER CLAUS · ESCHER KLAUS
34 granted patents·381 citations·filing 1987–1995
97Inventor score
Top patents by PatentIndex Score
34 records- 0190US4911863AAlkylbyphenyloxyacetic acid esters and their use in smectic liquid crystal materialsSECR DEFENCE BRIT·Filed 1987·Granted Mar 27, 1990·56 cites·7 claims
- 0285US4927244AUse 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 mediumHOECHST AG·Filed 1988·Granted May 22, 1990·22 cites·3 claims
- 0378US4988459AUse 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 estersHOECHST AG·Filed 1988·Granted Jan 29, 1991·14 cites·6 claims
- 0472US4906752ALiquid-crystal 5-phenylpyrimidine derivatives having sc or sc* phases and a process for preparing themHOECHST AG·Filed 1989·Granted Mar 6, 1990·9 cites·2 claims
- 0571US5384070AUse 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 estersHOECHST AG·Filed 1993·Granted Jan 24, 1995·26 cites·5 claims
- 0669US5407599ACyclopropylaklyl or -alkenyl or heterocyclic compounds, process for their preparation and their use in liquid-crystalline mixturesHOECHST AG·Filed 1993·Granted Apr 18, 1995·11 cites·19 claims
- 0767US5430564AProcess for producing ferroelectric liquid-crystal cells with oleophilic additive employing heat and low pressure overlapped a short timeHOECHST AG·Filed 1993·Granted Jul 4, 1995·22 cites·4 claims
- 0863US5118538AElectrically conductive polymers and their use as orienting layer in liquid-crystal switching and display elementsHOECHST AG·Filed 1990·Granted Jun 2, 1992·20 cites·7 claims
- 0962US5257122AFerroelectric liquid crystal display having gray steps or a continuous gray scaleHOECHST AG·Filed 1990·Granted Oct 26, 1993·24 cites·6 claims
- 1058US5071589ALiquid-crystalline mixtures, in particular ferroelectric liquid-crystalline mixturesHOECHST AG·Filed 1988·Granted Dec 10, 1991·13 cites·29 claims
- 1157US5539555AHigh contrast distorted helex effect electro-optic devices and tight ferroelectric pitch ferroelectric liquid crystal compositions useful thereinDISPLAYTECH INC·Filed 1992·Granted Jul 23, 1996·18 cites·24 claims
- 1257US4906401AUse of liquid-crystal 5-phenylpyrimidine derivatives as components of smectic liquid-crystal mixturesHOECHST AG·Filed 1989·Granted Mar 6, 1990·12 cites·5 claims
- 1356US5630962A2-Fluoropyridines, their preparation and their use in liquid crystal mixturesHOECHST AG·Filed 1995·Granted May 20, 1997·16 cites·18 claims
- 1456US5231528AFerroelectric liquid crystal components having high spontaneous polarization and low helical pitchHOECHST AG·Filed 1992·Granted Jul 27, 1993·12 cites·12 claims
- 1552US5361152AProcess for producing ferroelectric liquid-crystal cellsHOECHST AG·Filed 1991·Granted Nov 1, 1994·18 cites·2 claims
- 1650US5679792ADerivatives of 3-cyclohexylpropionic acid, and the use thereof in ferroelectric liquid-crystal mixturesHOECHST AG·Filed 1995·Granted Oct 21, 1997·4 cites·4 claims
- 1750US5206751AProcess for the production of an impact-resistant liquid crystal switching and display deviceHOECHST AG·Filed 1991·Granted Apr 27, 1993·10 cites·9 claims
- 1849US5353136AFerroelectric liquid crystal with positive dielectric anisotropy, chevron structure and grey scaleHOECHST AG·Filed 1990·Granted Oct 4, 1994·9 cites·4 claims
- 1948US5348684AOrganosilylalkyl or organosilylalkenyl compounds, process for preparing them and their use in liquid-crystalline mixturesHOECHST AG·Filed 1992·Granted Sep 20, 1994·9 cites·11 claims
- 2048US4891151ALiquid-crystalline phenylpyrimidinyl cyclohexanecarboxylates having a smectic phase, a process for their preparation, and their use in liquid-crystal mixturesHOECHST AG·Filed 1988·Granted Jan 2, 1990·2 cites·5 claims
- 2147US5702639AUse of complex ligands for ions in ferroelectric liquid-crystal mixturesHOECHST AG·Filed 1995·Granted Dec 30, 1997·9 cites·20 claims
- 2247US5333075AFerroelectric liquid crystal mixtures containing lipohilizing, lipophilic or amphiphilic compounds for eliminating ionic impuritiesHOECHST AG·Filed 1993·Granted Jul 26, 1994·8 cites·6 claims
- 2341US5373380AFerroelectric liquid crystal display with liquid crystal mixtures having high spontaneous polarization and short helical pitch and alignment layers containing lipophilic or amphiphilic compoundsHOECHST AG·Filed 1993·Granted Dec 13, 1994·10 cites·6 claims
- 2439US5651918AOptically 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 mixturesHOECHST AG·Filed 1995·Granted Jul 29, 1997·6 cites·6 claims
- 2538US5859680AElectrical addressing of ferroelectric liquid-crystal displaysHOECHST AG·Filed 1993·Granted Jan 12, 1999·8 cites·10 claims
- 2637US5360576AChiral alkenylaryl 2,3-epoxyalkyl ethers, and the use thereof in liquid-crystalline mixturesHOECHST AG·Filed 1991·Granted Nov 1, 1994·1 cites·6 claims
- 2735US5328638AOptically 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 estersHOECHST AG·Filed 1992·Granted Jul 12, 1994·3 cites·3 claims
- 2835US5286409ALiquid-crystalline mixtures, in particular ferroelectric liquid-crystalline mixturesHOECHST AG·Filed 1990·Granted Feb 15, 1994·3 cites·15 claims
- 2934US5378394AFerroelectric liquid-crystalline mixturesHOECHST AG·Filed 1990·Granted Jan 3, 1995·3 cites·9 claims
- 3031US5641428AUse 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-carboxylatesHOECHST AG·Filed 1992·Granted Jun 24, 1997·0 cites·6 claims
- 3131US5594575AFerroelectric liquid-crystal systems having three or more chiral additives with different signs of the helical twist in the cholesteric phaseHOECHST AG·Filed 1995·Granted Jan 14, 1997·1 cites·9 claims
- 3231US4748813AMethod of operating a thermal engine powered by a chemical reactionUNIV LELAND STANFORD JUNIOR·Filed 1987·Granted Jun 7, 1988·2 cites·12 claims
- 3330US5443754APyridylpyrimidines, a process for their preparation and their use in liquid-crystalline mixturesHOECHST AG·Filed 1992·Granted Aug 22, 1995·0 cites·6 claims
- 3430US5354500AOptically active carboxylic esters of oxygen-containing heterocycles as doping substances in liquid crystal mixtures and liquid crystal mixtures containing themHOECHST AG·Filed 1992·Granted Oct 11, 1994·0 cites·7 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →