Inventor
HEPPKE GERD
DE18 patents
⚠️ This page may combine multiple inventors who share the name “HEPPKE GERD”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HOECHST AG
10 patentsUS4988458AJan 29, 1991
Liquid crystal phase containing admixtures which effect temperature compensation
HOECHST AG26 citations92
US4826620AMay 2, 1989
Chiral phenolic esters of mesogenic carboxylic acids and their use as admixture in liquid crystal phases
HOECHST AG33 citations91
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
US4997591AMar 5, 1991
Chiral smetic liquid crystals and glassy materials containing the same for displaying and storing information
HOECHST AG17 citations73
US4874545AOct 17, 1989
Chiral esters of α-substituted phenylalkanoic acids and mesogenic hydroxy compounds, and their use as a doping substance in liquid crystal phases
HOECHST AG11 citations72
US5043095AAug 27, 1991
Chiral esters of mesogenic carboxylic acids in liquid crystal phases
HOECHST AG10 citations71
US5776363AJul 7, 1998
Compounds having side chains with multiple methyl branches and their use in liquid-crystal mixtures
HOECHST AG4 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
US5384068AJan 24, 1995
Switchable columnar liquid-crystalline systems
HOECHST AG2 citations56
US4939287AJul 3, 1990
Chiral esters of mesogenic carboxylic acids
HOECHST AG1 citations50
MERCK PATENT GMBH
5 patentsUS4818076AApr 4, 1989
Color-selective circular polarizer and its use
MERCK PATENT GMBH81 citations95
US4744918AMay 17, 1988
Liquid crystal phase
MERCK PATENT GMBH52 citations92
US4650600AMar 17, 1987
Liquid crystal phase
MERCK PATENT GMBH31 citations92
US4767194AAug 30, 1988
Blue phase liquid crystal system, method of operation and its use
MERCK PATENT GMBH37 citations86
US5236618AAug 17, 1993
Liquid crystal phase
MERCK PATENT GMBH8 citations73