Norbert Engel

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Bonn, DE

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Patents Grantslast 30 patents

Information Patent Grant
2-(O-Hydroxyphenyl)-pyrrole and process for its preparation
- Patent number 4,240,964
- Issue date Dec 23, 1980
- BASF Aktiengesellschaft
- Horst Koenig
- C07 - ORGANIC CHEMISTRY