Issued Patents 1997
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5703238 | Preparation of pyridine dyes | Ernst Schefczik, Sabine Gruttner-Merten, Peter Saling, Rudiger Sens | 1997-12-30 |
| 5700757 | Triazolopyridine dyes and intermediates therefor | Rudiger Sens, Peter Saling | 1997-12-23 |
| 5695686 | Brightener mixtures based on bisstyryl compounds | Manfred Hauptreif, Norbert Leppert, Karl-Heinz Etzbach, Peter Raatz, Manfred Herrmann | 1997-12-09 |
| 5623060 | Dye mixture containing at least four diazo dyes having the same color with a diaminopyridine coupling component | Gunther Lamm, Hermann Loeffler | 1997-04-22 |
| 5621107 | Sulfopyridones and a process of making therefor | Gunther Lamm, Matthias Wiesenfeldt | 1997-04-15 |
| 5616710 | Triazolopyridine dyes | Rudiger Sens, Ernst Schefczik, Karl-Heinz Etzbach | 1997-04-01 |
| 5612465 | Phenylazotriazolopyridine dyestuffs | Ernst Schefczik, Ruediger Sens, Karl-Heinz Etzbach, Clemens Grund | 1997-03-18 |
| 5608041 | Azo dyestuffs containing a diazo component from the aniline series and coupling component from the triazolopyridine series | Ernst Schefczik, Volker Bach, Clemens Grund | 1997-03-04 |