Issued Patents All Time
Showing 25 most recent of 42 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6043369 | [1,3,4] Triazolo [1,5-A] pyridines | — | 2000-03-28 |
| 5929245 | Naphtholactam dyes | Clemens Grund, Gunther Lamm, Roland Merger, Rudiger Sens | 1999-07-27 |
| 5703238 | Preparation of pyridine dyes | Sabine Gruttner-Merten, Peter Saling, Rudiger Sens, Helmut Reichelt | 1997-12-30 |
| 5654122 | N-aminopyridone dyes | Karl-Heinz Etzbach, Ruediger Sens, Matthias Wiesenfeldt | 1997-08-05 |
| 5637702 | Sulfur compounds | Manfred Patsch | 1997-06-10 |
| 5616710 | Triazolopyridine dyes | Rudiger Sens, Helmut Reichelt, Karl-Heinz Etzbach | 1997-04-01 |
| 5612465 | Phenylazotriazolopyridine dyestuffs | Ruediger Sens, Karl-Heinz Etzbach, Helmut Reichelt, Clemens Grund | 1997-03-18 |
| 5608041 | Azo dyestuffs containing a diazo component from the aniline series and coupling component from the triazolopyridine series | Volker Bach, Helmut Reichelt, Clemens Grund | 1997-03-04 |
| 5580980 | N-aminopyridone dyes | Karl-Heinz Etzbach, Ruediger Sens, Matthias Wiesenfeldt | 1996-12-03 |
| 5538939 | Acylamino-substituted isoxazole or isothiazole derivatives, their preparation and their use | Peter Muenster, Hartmann Koenig, Matthias Gerber, Karl-Otto Westphalen, Helmut Walter | 1996-07-23 |
| 5491232 | Sulfur compounds useful for preparation of dyes | Manfred Patsch | 1996-02-13 |
| 5466812 | Preparation of N-aminopyridones | Stefan Beckmann | 1995-11-14 |
| 5352774 | Dyes containing thiophene radicals | Guenter Hansen, Karl-Heinz Etzbach, Helmut Reichelt, Hermann Loeffler | 1994-10-04 |
| 5283326 | Dyes containing thiophene radicals | Guenter Hansen, Karl-Heinz Etzbach, Helmut Reichelt, Hermann Loeffler | 1994-02-01 |
| 5270456 | Azo dyes with A2-aminothiophene dye azo component and a coupling component and coupling component of the diphenylamine series | Erwin Hahn, Guenter Hansen, Karl-Heinz Etzbach, Helmut Reichelt, Sabine Greuttner +1 more | 1993-12-14 |
| 5212309 | 3-aminobenzene-1,2,4,5-tetracarboxylic dihydrazides and composition capable of chemiluminescence, and 3-aminobenzene-1,2,4,5-tetracarboxylic dianhydrides | Klaus Huemke | 1993-05-18 |
| 5206375 | Thiophene derivatives | Karl-Heinz Etzbach, Heinz Eilingsfeld | 1993-04-27 |
| 5147845 | Triazolopyridine dyes and thermal transfer of methine dyes | Ruediger Sens, Karl-Heinz Etzbach, Gunther Lamm, Helmut Reichelt, Matthias Wiesenfeldt | 1992-09-15 |
| 5145952 | Thiopheneazo dyes with a coupling component based on M-phenylenediamine | Heinz Eilingsfeld, Karl-Heinz Etzbach, Guenter Hansen, Helmut Reichelt | 1992-09-08 |
| 5132412 | Thiazoleazo dyes having a diazo component from the isothiazole or thiadiazole series | Guenter Hansen, Gunther Lamm, Helmut Reichelt | 1992-07-21 |
| 5101028 | (1,2,4)triazolo[2,3-a]pyridines | Helmut Reichelt | 1992-03-31 |
| 5079365 | Triazolopyridine dyes and thermal transfer of methine dyes | Rudiger Sens, Karl-Heinz Etzbach, Gunther Lamm, Helmut Reichelt, Matthias Wiesenfeldt | 1992-01-07 |
| 5062861 | Novel navy and black disperse dye mixtures including amino-phenyl thiophene azo disperse dye and red, yellow or orange disperse dyes | Erwin Hahn, Guenter Hansen, Karl-Heinz Etzbach, Helmut Reichelt, Helmut Degen +2 more | 1991-11-05 |
| 5047570 | Preparation of 2-cyano-3-aminoacrylonitrile derivatives | — | 1991-09-10 |
| 4994564 | Azo dyes with a diazo component of the 3-amino thiophene series and a coupling component of the pyridine, pyridone or pyrazole series | Karl-Heinz Etzbach, Helmut Reichelt, Guenter Hansen, Helmut Hagen, Gunther Lamm | 1991-02-19 |