Inventor

OHLENDORF DIETER

DE32 patents

Patents

32 patents

US5430564AJul 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

US4927244AMay 22, 1990

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

HOECHST AG22 citations81

US4828765AMay 9, 1989

Oxyalkylated quaternary ammonium compounds and their use as drag reducing agents

HOECHST AG23 citations81

US5118538AJun 2, 1992

Electrically conductive polymers and their use as orienting layer in liquid-crystal switching and display elements

HOECHST AG20 citations80

US5071589ADec 10, 1991

Liquid-crystalline mixtures, in particular ferroelectric liquid-crystalline mixtures

HOECHST AG13 citations74

US4985172AJan 15, 1991

Chiral aryloxypropionates, and the use thereof as dopes in liquid-crystal phases

HOECHST AG8 citations74

US4906752AMar 6, 1990

Liquid-crystal 5-phenylpyrimidine derivatives having sc or sc* phases and a process for preparing them

HOECHST AG9 citations74

US4906401AMar 6, 1990

Use of liquid-crystal 5-phenylpyrimidine derivatives as components of smectic liquid-crystal mixtures

HOECHST AG12 citations74

US4876028AOct 24, 1989

Chiral aryl-2,3-epoxyalkyl-ethers and the corresponding thio compounds thereof, and the use thereof as dopes in liquid-crystal phases

HOECHST AG13 citations74

US5407599AApr 18, 1995

Cyclopropylaklyl or -alkenyl or heterocyclic compounds, process for their preparation and their use in liquid-crystalline mixtures

HOECHST AG11 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

US4988459AJan 29, 1991

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

HOECHST AG14 citations72

US4859418AAug 22, 1989

Process and compositions for corrosion inhibition of metallic materials

HOECHST AG11 citations68

US4968798ANov 6, 1990

Liquid-crystalline, 1-substituted piperidine-4-carboxylic acid esters

HOECHST AG2 citations63

US4915868AApr 10, 1990

Optically active esters of 1-acylproline as dopes in liquid-crystal mixtures, and novel optically active esters of 1-acylproline

HOECHST AG3 citations63

US4891151AJan 2, 1990

Liquid-crystalline phenylpyrimidinyl cyclohexanecarboxylates having a smectic phase, a process for their preparation, and their use in liquid-crystal mixtures

HOECHST AG2 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

US4855429AAug 8, 1989

Chiral esters formed from α-substituted carboxylic acids and mesogenic hydroxyl compounds, and their use as dopants in liquid-crystalline phases

HOECHST AG4 citations62

US5651918AJul 29, 1997

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

HOECHST AG6 citations61

US4705860ANov 10, 1987

Quaternary ammonium salts and their use as drag reducing agents

HOECHST AG5 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

US5356542AOct 18, 1994

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

HOECHST AG0 citations42

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

OHLENDORF DIETER

Patents

Process for producing ferroelectric liquid-crystal cells with oleophilic additive employing heat and low pressure overlapped a short time

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

Ferroelectric liquid crystal display having gray steps or a continuous gray scale

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

Oxyalkylated quaternary ammonium compounds and their use as drag reducing agents

Electrically conductive polymers and their use as orienting layer in liquid-crystal switching and display elements

Liquid-crystalline mixtures, in particular ferroelectric liquid-crystalline mixtures

Chiral aryloxypropionates, and the use thereof as dopes in liquid-crystal phases

Liquid-crystal 5-phenylpyrimidine derivatives having sc or sc* phases and a process for preparing them

Use of liquid-crystal 5-phenylpyrimidine derivatives as components of smectic liquid-crystal mixtures

Chiral aryl-2,3-epoxyalkyl-ethers and the corresponding thio compounds thereof, and the use thereof as dopes in liquid-crystal phases

Cyclopropylaklyl or -alkenyl or heterocyclic compounds, process for their preparation and their use in liquid-crystalline mixtures

Process for producing ferroelectric liquid-crystal cells

Ferroelectric liquid crystal with positive dielectric anisotropy, chevron structure and grey scale

Organosilylalkyl or organosilylalkenyl compounds, process for preparing them and their use in liquid-crystalline mixtures

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

Process and compositions for corrosion inhibition of metallic materials

Liquid-crystalline, 1-substituted piperidine-4-carboxylic acid esters

Optically active esters of 1-acylproline as dopes in liquid-crystal mixtures, and novel optically active esters of 1-acylproline

Liquid-crystalline phenylpyrimidinyl cyclohexanecarboxylates having a smectic phase, a process for their preparation, and their use in liquid-crystal mixtures

Ferroelectric liquid-crystalline mixtures

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

Liquid-crystalline mixtures, in particular ferroelectric liquid-crystalline mixtures

Chiral esters formed from α-substituted carboxylic acids and mesogenic hydroxyl compounds, and their use as dopants in liquid-crystalline phases

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

Quaternary ammonium salts and their use as drag reducing agents

Ferroelectric liquid-crystal systems having three or more chiral additives with different signs of the helical twist in the cholesteric phase

Mixtures of organic ammonium salts and their use as flow accelerators

Mixtures of organic ammonium salts as flow accelerators

Method of controlling the mobility of flows through fissures, slits or pores

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

Optically active carboxylic esters of oxygen-containing heterocycles as doping substances in liquid crystal mixtures and liquid crystal mixtures containing them