Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5068335 | Process for the preparation of 4-hydroxy-2,2,6,6-tetramethylpiperidine | Ulrich Kress, Rudolf Maul | 1991-11-26 |
| 4731448 | Process for the preparation of 1-(2-hydroxyethyl)-2,2,6,6-tetramethyl-4-piperidinol | Heinz Issler, Lutz Konig, Hans-Werner Stephan | 1988-03-15 |
| 4230867 | Process for the production of 2-aryl-2H-benzotriazoles | Ulrich Kress | 1980-10-28 |