Siegfried Schwerin

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Hofheim am Taunus, DE

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Patents Grantslast 30 patents

Information Patent Grant
Nitrogen-containing surface-active agents
- Patent number 5,266,682
- Issue date Nov 30, 1993
- Hoechst Aktiengesellschaft
- Heinz Uhrig
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Nitrogen-containing condensation products based on unmodified or mo...
- Patent number 4,939,238
- Issue date Jul 3, 1990
- Hoechst Aktiengesellschaft
- Heinz Uhrig
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Azo pigment formulations
- Patent number 4,515,639
- Issue date May 7, 1985
- Hoechst Aktiengesellschaft
- Peter Dopfer
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...