| 5352774 |
Dyes containing thiophene radicals |
Ernst Schefczik, Karl-Heinz Etzbach, Helmut Reichelt, Hermann Loeffler |
1994-10-04 |
| 5330543 |
Thiopheneazo dyes with a coupling component of the diaminopyridine series |
Gunther Lamm, Hermann Loeffler, Helmut Reichelt, Helmut Degen, Arno Lange +1 more |
1994-07-19 |
| 5283326 |
Dyes containing thiophene radicals |
Ernst Schefczik, 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, Karl-Heinz Etzbach, Helmut Reichelt, Ernst Schefczik, Sabine Greuttner +1 more |
1993-12-14 |
| 5264560 |
Preparation of quaternized azo dyes |
Johannes P. Dix, Helmut Reichelt, Clemens Grund |
1993-11-23 |
| 5247071 |
Preparation of acetalized azo dyes |
Georg Zeidler |
1993-09-21 |
| 5216139 |
Thiopheneazo dye based on a coupling component of the thiazole series |
Karl-Heinz Etzbach, Gunther Lamm, Helmut Reichelt |
1993-06-01 |
| 5182372 |
Aniline-based oil-soluble azo dyes |
Bernd Derber, Helmut Reichelt, Christos Vamvakaris, Georg Zeidler |
1993-01-26 |
| 5175265 |
Azo dyes with a diazo component of the 4-amino-7-nitrobenzisothiazole series and a coupling compound from the aminopyrazole or hydroxypyridone series |
Helmut Hagen, Helmut Reichelt |
1992-12-29 |
| 5151506 |
Phenoneazo dyes |
Volker Bach, Gunther Lamm, Ruediger Sens |
1992-09-29 |
| 5145952 |
Thiopheneazo dyes with a coupling component based on M-phenylenediamine |
Heinz Eilingsfeld, Karl-Heinz Etzbach, Helmut Reichelt, Ernst Schefczik |
1992-09-08 |
| 5132412 |
Thiazoleazo dyes having a diazo component from the isothiazole or thiadiazole series |
Gunther Lamm, Helmut Reichelt, Ernst Schefczik |
1992-07-21 |
| 5112362 |
Navy dye mixtures of azo disperse dyes for polyester |
Erwin Hahn, Gunther Lamm, Helmut Reichelt, Gerhard Wagenblast |
1992-05-12 |
| 5104979 |
Polyazo dyes with diazo components of the aminophenol and the amino diphenyl-sulfide, -sulfoxide or -sulfone series |
Georg Zeidler, Ortwin Schaffer |
1992-04-14 |
| 5073634 |
Tetrachloroferrates of basic dyes |
Johannes P. Dix, Hellmut Kast |
1991-12-17 |
| 5066791 |
Pyridoneazo dyes with an M-aminobenzoic ester as the diazo component |
Gunther Lamm, Hermann Loeffler |
1991-11-19 |
| 5062861 |
Novel navy and black disperse dye mixtures including amino-phenyl thiophene azo disperse dye and red, yellow or orange disperse dyes |
Erwin Hahn, Karl-Heinz Etzbach, Helmut Reichelt, 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, Helmut Reichelt |
1991-10-22 |
| 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, Ernst Schefczik, Helmut Hagen, Gunther Lamm |
1991-02-19 |
| 4976744 |
Preparation of concentrated solutions of cationic dyes as mono-carboxylates in glycol ether |
Johannes P. Dix, Hellmut Kast |
1990-12-11 |
| 4960873 |
3-pyridylisothiazoleazo compounds useful as disperse dyes |
Gunther Lamm, Helmut Reichelt, Ernst Schefczik |
1990-10-02 |
| 4960874 |
Isothiazolylazo dyes having aminophenyl and aminonaphthyl components |
Udo Bergmann, Johannes D. Dix, Ernst Schefczik, Guenther Seybold |
1990-10-02 |
| 4948702 |
Photosensitive recording element |
Guenter Wallbillich, Peter Neumann |
1990-08-14 |
| 4929720 |
Isothiazoleazo hydroxypyridone dyes |
Ernst Schefczik, Helmut Reichelt |
1990-05-29 |
| 4908437 |
Thien-2-one compounds with an alkylidene or imino group in the 5-position of the ring |
Johannes P. Dix, Helmut Reichelt, Masahiro Hayashi |
1990-03-13 |
