Hans-Peter Biermann

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Krefeld, DE

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Patents Grantslast 30 patents

Information Patent Grant
Process for the production of iron oxide yellow pigments
- Patent number 5,185,141
- Issue date Feb 9, 1993
- Bayer Aktiengesellschaft
- Bernd Krockert
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Antifoaming additive for acid liquids
- Patent number 4,897,166
- Issue date Jan 30, 1990
- Bayer Aktiengesellschaft
- Detlef Melzer
- C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
Information Patent Grant
Thermostable iron oxide pigments
- Patent number 4,491,619
- Issue date Jan 1, 1985
- Bayer Aktiengesellschaft
- Hans-Peter Biermann
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Agglomerated ferromagnetic iron particles
- Patent number 4,470,844
- Issue date Sep 11, 1984
- Bayer Aktiengesellschaft
- Jakob Rademachers
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Magnetic metal and alloy pigments
- Patent number 4,325,739
- Issue date Apr 20, 1982
- Bayer Aktiengesellschaft
- Hans-Peter Biermann
- B22 - CASTING POWDER METALLURGY