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Feodor Oestreicher
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Berlin, DE
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last 30 patents
Information
Patent Grant
Liquid crystal phase
Patent number
5,236,618
Issue date
Aug 17, 1993
Merck Patent Gesellschaft mit beschrankter Haftung
Gerd Heppke
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Chiral esters of mesogenic carboxylic acids in liquid crystal phases
Patent number
5,043,095
Issue date
Aug 27, 1991
Hoechst Aktiengesellschaft
Christian Bahr
C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information
Patent Grant
Chiral smetic liquid crystals and glassy materials containing the s...
Patent number
4,997,591
Issue date
Mar 5, 1991
Hoechst Aktiengesellschaft
Gerd Heppke
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Liquid crystal phase containing admixtures which effect temperature...
Patent number
4,988,458
Issue date
Jan 29, 1991
Hoechst Aktiengesellschaft
Gerd Heppke
C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information
Patent Grant
Chiral esters of mesogenic carboxylic acids
Patent number
4,939,287
Issue date
Jul 3, 1990
Hoechst Aktiengesellschaft
Christian Bahr
C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information
Patent Grant
Chiral phenolic esters of mesogenic carboxylic acids and their use...
Patent number
4,826,620
Issue date
May 2, 1989
Hoechst Aktiengesellschaft
Gerd Heppke
C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information
Patent Grant
Color-selective circular polarizer and its use
Patent number
4,818,076
Issue date
Apr 4, 1989
Merck Patent Gesellschaft mit beschrankter Haftung
Gerd Heppke
G02 - OPTICS
Information
Patent Grant
Blue phase liquid crystal system, method of operation and its use
Patent number
4,767,194
Issue date
Aug 30, 1988
Merck Patent Gesellschaft mit beschrankter Haftung
Gerd Heppke
G02 - OPTICS
Information
Patent Grant
Liquid crystal phase
Patent number
4,744,918
Issue date
May 17, 1988
Merck Patent Gesellschaft mit beschrankter Haftung
Gerd Heppke
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Liquid crystal phase
Patent number
4,650,600
Issue date
Mar 17, 1987
Merck Patent Gesellschaft mit beschrankter Haftung
Gerd Heppke
C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information
Patent Grant
Liquid crystal display devices having an induced cholesteric phase
Patent number
4,264,148
Issue date
Apr 28, 1981
Siemens Aktiengesellschaft
Annerose Gobl-Wunsch
G02 - OPTICS