Herbert Hovestadt

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Erftstadt, DE

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Patents Grantslast 30 patents

Information Patent Grant
Method of preparing lower sodium polysulfides from higher sodium po...
- Patent number 5,080,881
- Issue date Jan 14, 1992
- Degussa Aktiengesellschaft
- Friedrich Bittner
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Process for working up the filtration residue of crude sodium prepa...
- Patent number 4,857,665
- Issue date Aug 15, 1989
- Degussa Aktiengesellschaft
- Walter Hinrichs
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for creating the flow properties to sodium-production filte...
- Patent number 4,767,453
- Issue date Aug 30, 1988
- Degussa Aktiengesellschaft
- Walter Hinrichs
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Process for the production of sodium polysulfides from the elements...
- Patent number 4,640,832
- Issue date Feb 3, 1987
- Degussa Aktiengesellschaft
- Friedrich Bittner
- C01 - INORGANIC CHEMISTRY