Gerhard Wiederhoft

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Krefeld, DE

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Patents Grantslast 30 patents

Information Patent Grant
Nanodisperse titanium dioxide, process for the production thereof a...
- Patent number 5,840,111
- Issue date Nov 24, 1998
- Bayer AG
- Gerhard Wiederhoft
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Process for the calcination of filter cakes with high solids conten...
- Patent number 5,174,817
- Issue date Dec 29, 1992
- Bayer Aktiengesellschaft
- Bernd-Michael Holle
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Process for the production of TiO.sub.2 pigments
- Patent number 5,094,834
- Issue date Mar 10, 1992
- Bayer Aktiengesellschaft
- Gerhard Wiederhoft
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Process for the recorvery of sulphuric acid in the production of ti...
- Patent number 4,988,495
- Issue date Jan 29, 1991
- Bayer Aktiengesellschaft
- Gerhard Wiederhoft
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Process for the preparation of titanium dioxide
- Patent number 4,663,131
- Issue date May 5, 1987
- Bayer Aktiengesellschaft
- Rudolf Gerken
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...