Inventor

Dieter Ohlendorf

Inventor

Liederbach, DE

Overview

1986–1997

Patent span

Chemistry

Primary field (CPC C)

Patents· 32 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

C09Kprimary

C09KMaterials for miscellaneous applications, not provided for elsewhere41%

C07DHeterocyclic compounds22%

G02FOptical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein14%

C07CAcyclic or carbocyclic compounds9%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests4%

A61MDevices for introducing media into, or onto, the body1%

B23BTurning1%

C04BLime, magnesia1%

C07FAcyclic, carbocyclic or heterocyclic compounds containing elements other than carbon, hydrogen, halogen, oxygen, nitrogen, sulfur, selenium or tellurium1%

C23FNon-mechanical removal of metallic material from surface1%

PatentTitleYear

5,651,918'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'1997 5,641,428'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'1997 5,594,575'Ferroelectric liquid-crystal systems having three or more chiral additives with different signs of the helical twist in the cholesteric phase'1997 5,430,564'Process for producing ferroelectric liquid-crystal cells with oleophilic additive employing heat and low pressure overlapped a short time'1995 5,407,599'Cyclopropylaklyl or -alkenyl or heterocyclic compounds, process for their preparation and their use in liquid-crystalline mixtures'1995 5,384,070'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'1995 5,378,394'Ferroelectric liquid-crystalline mixtures'1995 5,361,152'Process for producing ferroelectric liquid-crystal cells'1994 5,356,542'Mixtures of organic ammonium salts and their use as flow accelerators'1994 5,354,500'Optically active carboxylic esters of oxygen-containing heterocycles as doping substances in liquid crystal mixtures and liquid crystal mixtures containing them'1994 5,353,136'Ferroelectric liquid crystal with positive dielectric anisotropy, chevron structure and grey scale'1994 5,348,684'Organosilylalkyl or organosilylalkenyl compounds, process for preparing them and their use in liquid-crystalline mixtures'1994 5,328,638'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'1994 5,312,553'Mixtures of organic ammonium salts as flow accelerators'1994 5,286,409'Liquid-crystalline mixtures, in particular ferroelectric liquid-crystalline mixtures'1994 5,257,122'Ferroelectric liquid crystal display having gray steps or a continuous gray scale'1993 5,118,538'Electrically conductive polymers and their use as orienting layer in liquid-crystal switching and display elements'1992 5,071,589'Liquid-crystalline mixtures, in particular ferroelectric liquid-crystalline mixtures'1991 4,988,459'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'1991 4,985,172'Chiral aryloxypropionates, and the use thereof as dopes in liquid-crystal phases'1991 4,968,798'Liquid-crystalline, 1-substituted piperidine-4-carboxylic acid esters'1990 4,927,244'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'1990 4,915,868'Optically active esters of 1-acylproline as dopes in liquid-crystal mixtures, and novel optically active esters of 1-acylproline'1990 4,906,401'Use of liquid-crystal 5-phenylpyrimidine derivatives as components of smectic liquid-crystal mixtures'1990 4,906,752'Liquid-crystal 5-phenylpyrimidine derivatives having sc or sc* phases and a process for preparing them'1990 4,891,151'Liquid-crystalline phenylpyrimidinyl cyclohexanecarboxylates having a smectic phase, a process for their preparation, and their use in liquid-crystal mixtures'1990 4,876,028'Chiral aryl-2,3-epoxyalkyl-ethers and the corresponding thio compounds thereof, and the use thereof as dopes in liquid-crystal phases'1989 4,859,418'Process and compositions for corrosion inhibition of metallic materials'1989 4,855,429'Chiral esters formed from .alpha.-substituted carboxylic acids and mesogenic hydroxyl compounds, and their use as dopants in liquid-crystalline phases'1989 4,828,765'Oxyalkylated quaternary ammonium compounds and their use as drag reducing agents'1989 4,705,860'Quaternary ammonium salts and their use as drag reducing agents'1987 4,584,109'Method of controlling the mobility of flows through fissures, slits or pores'1986

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1986–1997Patents assigned to HOECHST AG (32)· patent assignee history

1986–1997Based in Liederbach, DE· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
HOECHST AG	32	1986–1997

Locations

Location	Patents	Span
Liederbach, DE	32	1986–1997