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Helmut Troster
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Konigstein, DE
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last 30 patents
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Patent Grant
Black peryene-3,4,9,10-tetracarboxylic diimides, their preparation...
Patent number
5,319,083
Issue date
Jun 7, 1994
Hoechst Aktiengesellschaft
Helmut Troster
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Mix-crystal pigments based on perylenetetracarbimides, process for...
Patent number
5,154,770
Issue date
Oct 13, 1992
Hoechst Aktiengesellschaft
Ernst Spietschka
C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information
Patent Grant
Process for the preparation of arylimides of perylene-3,4,9,10-tetr...
Patent number
4,831,140
Issue date
May 16, 1989
Hoechst Aktiengesellschaft
Ernst Spietschka
C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information
Patent Grant
Pigment for electrophotographic recording processes
Patent number
4,786,575
Issue date
Nov 22, 1988
Hoechst Aktiengesellschaft
Hans-Tobias Macholdt
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Mix-crystal pigments based on perylenetetracarbimides, process for...
Patent number
4,769,460
Issue date
Sep 6, 1988
Hoechst Aktiengesellschaft
Ernst Spietschka
C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information
Patent Grant
Mix-crystal pigments based on perylenetetracarbimides, process for...
Patent number
4,742,170
Issue date
May 3, 1988
Hoechst Aktiengesellschaft
Ernst Spietschka
C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information
Patent Grant
Process for the preparation of perylene-3,4,9,10-tetracarboxylic ac...
Patent number
4,709,029
Issue date
Nov 24, 1987
Hoechst Aktiengesellschaft
Ernst Spietschka
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Perylene-3,4,9,10-tetracarboxylic acid monoanhydride monoimides
Patent number
4,599,408
Issue date
Jul 8, 1986
Hoechst Aktiengesellschaft
Ernst Spietschka
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Perylene-3,4,9,10-tetracarboxylic acid monoanhydride monoimide and...
Patent number
4,594,420
Issue date
Jun 10, 1986
Hoechst Aktiengesellschaft
Ernst Spietschka
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Monoalkali metal salts of perylene-3,4,9,10-tetracarboxylic acid mo...
Patent number
4,501,906
Issue date
Feb 26, 1985
Hoechst Aktiengesellschaft
Ernst Spietschka
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Water soluble benzoxanthene dyestuffs for fluorescent inks
Patent number
4,242,139
Issue date
Dec 30, 1980
Hoechst Aktiengesellschaft
Helmut Troster
C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information
Patent Grant
Dyed polyesters, process for their preparation and their use for th...
Patent number
4,116,923
Issue date
Sep 26, 1978
Hoechst Aktiengesellschaft
Hans Gattner
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...