Stefan Frentzen

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Raesfeld, DE

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Patents Grantslast 30 patents

Information Patent Grant
Continuous process for the preparation of 4-amino-2,2,6,6-tetrameth...
- Patent number 5,773,622
- Issue date Jun 30, 1998
- Huels Aktiengesellschaft
- Udo Jegelka
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Solvent-free process for preparing 4-amino-2,2,6,6-tetramethylpiper...
- Patent number 5,693,817
- Issue date Dec 2, 1997
- Huels Aktiengesellschaft
- Stefan Frentzen
- C07 - ORGANIC CHEMISTRY