Issued Patents All Time
Showing 26–41 of 41 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5929245 | Naphtholactam dyes | Clemens Grund, Ernst Schefczik, Gunther Lamm, Roland Merger | 1999-07-27 |
| 5853432 | Dye mixtures comprising methine and anthraquinone dyes | Karl-Heinz Etzbach | 1998-12-29 |
| 5849361 | Methine dyes based on formylaminopyridones | Andreas Schmidt, Friedrich-Wilhelm Raulfs, Karl-Heinz Etzbach | 1998-12-15 |
| 5811370 | Azamethine dyes | Andreas Schmidt, Stefan Beckmann, Karl-Heinz Etzbach | 1998-09-22 |
| 5789560 | Azo dyes with a coupling component of the aminothiazole series | Karl-Heinz Etzbach | 1998-08-04 |
| 5785719 | Methine and Azo dye-containing dye mixtures | Karl-Heinz Etzbach | 1998-07-28 |
| 5783649 | Polymerizable azo dyes with a thiophene structure | Stefan Beckmann, Karl-Heinz Etzbach | 1998-07-21 |
| 5777089 | Phenol derivatives, their preparation and their use, in particular in nonlinear optics | Stefan Beckmann, Karl-Heinz Etzbach | 1998-07-07 |
| 5773623 | Methine dyes containing a 5- or 6- membered carbocyclic or heterocyclic radical | Andreas Schmidt | 1998-06-30 |
| 5756753 | Methine and azamethine dyes based on naphthoquinones in nonlinear optics | Stefan Beckmann, Karl-Heinz Etzbach | 1998-05-26 |
| 5714616 | Thiazolemethine dyes | Stefan Beckmann, Karl-Heinz Etzbach | 1998-02-03 |
| 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 |
| 5545235 | Thermal transfer of pyridone dyes | Karl-Heinz Etzbach | 1996-08-13 |
| 5079365 | Triazolopyridine dyes and thermal transfer of methine dyes | Ernst Schefczik, Karl-Heinz Etzbach, Gunther Lamm, Helmut Reichelt, Matthias Wiesenfeldt | 1992-01-07 |