Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5695686 | Brightener mixtures based on bisstyryl compounds | Norbert Leppert, Karl-Heinz Etzbach, Helmut Reichelt, Peter Raatz, Manfred Herrmann | 1997-12-09 |
| 5245081 | Preparation of N,N-disubstituted m-aminophenols | Helmut Reichelt | 1993-09-14 |