Issued Patents All Time
Showing 101–121 of 121 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5158928 | Azo dyes for thermotransfer printing | Volker Bach, Karl-Heinz Etzbach, Sabine Gruettner, Gunther Lamm, Ruediger Sens | 1992-10-27 |
| 5147845 | Triazolopyridine dyes and thermal transfer of methine dyes | Ruediger Sens, Ernst Schefczik, Karl-Heinz Etzbach, Gunther Lamm, Matthias Wiesenfeldt | 1992-09-15 |
| 5145952 | Thiopheneazo dyes with a coupling component based on M-phenylenediamine | Heinz Eilingsfeld, Karl-Heinz Etzbach, Guenter Hansen, Ernst Schefczik | 1992-09-08 |
| 5132412 | Thiazoleazo dyes having a diazo component from the isothiazole or thiadiazole series | Guenter Hansen, Gunther Lamm, Ernst Schefczik | 1992-07-21 |
| 5112362 | Navy dye mixtures of azo disperse dyes for polyester | Erwin Hahn, Guenter Hansen, Gunther Lamm, Gerhard Wagenblast | 1992-05-12 |
| 5101028 | (1,2,4)triazolo[2,3-a]pyridines | Ernst Schefczik | 1992-03-31 |
| 5079365 | Triazolopyridine dyes and thermal transfer of methine dyes | Rudiger Sens, Ernst Schefczik, Karl-Heinz Etzbach, Gunther Lamm, Matthias Wiesenfeldt | 1992-01-07 |
| 5072049 | Process for the preparation of bis(4-hydroxyphenyl) sulfone | Michael Stumpp, Peter Neumann, Bernd Hupfeld | 1991-12-10 |
| 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, Ernst Schefczik, Helmut Degen +2 more | 1991-11-05 |
| 5059684 | Azo dyes whose diazo and coupling components stem from the thiazole series | Gunther Lamm, Karl-Heinz Etzbach, Matthias Wiesenfeldt, Guenter Hansen | 1991-10-22 |
| 5037798 | Transfer of AZO dyes | Karl-Heinz Etzbach, Gunther Lamm, Ruediger Sens | 1991-08-06 |
| 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, Guenter Hansen, Ernst Schefczik, Helmut Hagen, Gunther Lamm | 1991-02-19 |
| 4960873 | 3-pyridylisothiazoleazo compounds useful as disperse dyes | Guenter Hansen, Gunther Lamm, Ernst Schefczik | 1990-10-02 |
| 4939118 | Transfer of azo dyes having a pyridine coupling component | Karl-Heinz Etzbach, Gunther Lamm, Hermann Loeffler, Ruediger Sens | 1990-07-03 |
| 4929720 | Isothiazoleazo hydroxypyridone dyes | Guenter Hansen, Ernst Schefczik | 1990-05-29 |
| 4908041 | Navy and black dye mixtures: thiophene azo disperse dye and red, yellow or orange disperse dye | Erwin Hahn, Guenter Hansen, Karl-Heinz Etzbach, Ernst Schefczik, Helmut Degen +2 more | 1990-03-13 |
| 4908437 | Thien-2-one compounds with an alkylidene or imino group in the 5-position of the ring | Guenter Hansen, Johannes P. Dix, Masahiro Hayashi | 1990-03-13 |
| 4904777 | Mono azo dyes containing as diazo radical a thiophene radical which possesses an oxime group | Karl-Heinz Etzbach, Guenter Hansen, Ernst Schefczik | 1990-02-27 |
| 4843153 | Azo dyes containing thienothiophene radicals as radicals of the diazo component | Heinz Eilingsfeld, Karl-Heinz Etzbach, Guenter Hansen | 1989-06-27 |
| 4837269 | 2-aminothiophene radical substituted by an electron withdrawing group | Karl-Heinz Etzbach, Guenter Hansen, Ernst Schefczik | 1989-06-06 |
| 4751288 | Azo dyes containing 2-amino-3-cyano-5-formylthiophene derivatives as diazo components and substituted aniline compounds as coupling components | Udo Bergmann, Erwin Hahn, Guenter Hansen | 1988-06-14 |