Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5703238 | Preparation of pyridine dyes | Ernst Schefczik, Sabine Gruttner-Merten, Peter Saling, Helmut Reichelt | 1997-12-30 |
| 5700757 | Triazolopyridine dyes and intermediates therefor | Helmut Reichelt, Peter Saling | 1997-12-23 |
| 5616710 | Triazolopyridine dyes | Ernst Schefczik, Helmut Reichelt, Karl-Heinz Etzbach | 1997-04-01 |