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Hartmut Behringer
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Erftstadt, DE
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last 30 patents
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Patent Grant
Process for making azo pigments
Patent number
4,920,205
Issue date
Apr 24, 1990
Hoechst Aktiengesellschaft
Heinrich Rehberg
C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information
Patent Grant
Process for making azo pigments
Patent number
4,920,206
Issue date
Apr 24, 1990
Hoechst Aktiengesellschaft
Hartmut Behringer
C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information
Patent Grant
Continuous production of azo pigments
Patent number
4,454,067
Issue date
Jun 12, 1984
Hoechst Aktiengesellschaft
Hartmut Behringer
C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information
Patent Grant
Process for controlling diazotization reactions involving nitrous r...
Patent number
4,439,361
Issue date
Mar 27, 1984
Hoechst Aktiengesellschaft
Kurt Karrenbauer
C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information
Patent Grant
Continuous diazotization of amines
Patent number
4,268,437
Issue date
May 19, 1981
Hoechst Aktiengesellschaft
Hartmut Behringer
C07 - ORGANIC CHEMISTRY