Bernhard Spreckelmeyer

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Leverkusen, DE

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Patents Grantslast 30 patents

Information Patent Grant
Method for manufacturing alkali chromates from chromium ore
- Patent number 5,667,759
- Issue date Sep 16, 1997
- Bayer Aktiengesellschaft
- Rainer Bellinghausen
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Method for manufacturing alkali chromates from chromium ore
- Patent number 5,505,918
- Issue date Apr 9, 1996
- Bayer Aktiengesellschaft
- Uwe Arndt
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Process for the production of sodium dichromate
- Patent number 5,250,274
- Issue date Oct 5, 1993
- Bayer Aktiengesellschaft
- Norbert Lonhoff
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Electrochemical process for the production of chromic acid
- Patent number 5,068,015
- Issue date Nov 26, 1991
- Bayer Aktiengesellschaft
- Hans-Dieter Block
- C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR