Hartmut Springer

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Frankfurt am Main, DT

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Patents Grantslast 30 patents

Information Patent Grant
Water-soluble naphyhyl-azo-pyrazolone fiber reactive dyestuffs
- Patent number 4,046,754
- Issue date Sep 6, 1977
- Hoechst Aktiengesellschaft
- Fritz Meininger
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Water-soluble reactive naphthylazonaphthyl dyestuffs
- Patent number 4,045,428
- Issue date Aug 30, 1977
- Hoechst Aktiengesellschaft
- Fritz Meininger
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Phthalocyanine dyestuffs and process for preparing them
- Patent number 4,033,980
- Issue date Jul 5, 1977
- Hoechst Aktiengesellschaft
- Fritz Meininger
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Naphthylazo naphthyl copper complex dyestuffs
- Patent number 3,966,704
- Issue date Jun 29, 1976
- Hoechst Aktiengesellschaft
- Fritz Meininger
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...