Issued Patents All Time
Showing 1–17 of 17 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5547477 | Dye mixtures with pyridoneazo dyes | Arno Lange, Gunther Lamm, Helmut Reichelt, Dieter Wegerle | 1996-08-20 |
| 5502170 | Azo dyes with an acetalized diazo component of the thiophene or thiazole series | Sabine Gruettner-Merten, Helmut Reichelt, Arno Lange | 1996-03-26 |
| 5466790 | Azo dyes with an acetalized diazo component of the thiophene or thiazole series | Sabine Gruettner-Merten, Helmut Reichelt, Arno Lange | 1995-11-14 |
| 5382263 | Blue dye mixtures of high brilliance | Arno Lange, Sabine Gruettner-Merten, Helmut Reichelt | 1995-01-17 |
| 5364972 | Preparation of nitrobenzophenones, and a color-stable modification of a benzophenone-azopyridone dye | Norbert Zimmerman, Ralf Brueckmann, Gunther Lamm, Arno Lange, Helmut Reichelt | 1994-11-15 |
| 5330543 | Thiopheneazo dyes with a coupling component of the diaminopyridine series | Guenter Hansen, Gunther Lamm, Hermann Loeffler, Helmut Reichelt, Arno Lange +1 more | 1994-07-19 |
| 5318601 | Dye mixtures containing azo and quinophthalone dyes | Arno Lange, Gert Motzkus, Volker Walther | 1994-06-07 |
| 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, Ernst Schefczik +1 more | 1993-12-14 |
| 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, Ernst Schefczik +2 more | 1991-11-05 |
| 4925954 | Vat dye based on flouranthene | Manfred Patsch, Gerhard Epple, Helmut Flohr, Uwe Nahr | 1990-05-15 |
| 4908041 | Navy and black dye mixtures: thiophene azo disperse dye and red, yellow or orange disperse dye | Erwin Hahn, Guenter Hansen, Karl-Heinz Etzbach, Helmut Reichelt, Ernst Schefczik +2 more | 1990-03-13 |
| 4537597 | Navy blue mixtures of disperse mono-azo dyes for cellulose acetate | Udo Bergmann, Guenter Hansen, Reinhold Krallmann, Hans Weber | 1985-08-27 |
| 4486198 | Navy dye mixtures | Ernst Becker, Udo Bergmann, Guenter Hansen, Reinhold Krallmann | 1984-12-04 |
| 4464181 | Mixtures of benzisothiazole mono-azo dyes for cellulose acetate | Johannes P. Dix, Norbert Grund, Guenter Hansen, Reinhold Krallmann | 1984-08-07 |
| 4405330 | Navy disperse dye mixtures | Udo Bergmann, Guenter Hansen, Reinhold Krallmann, Wolf-Dieter Kermer | 1983-09-20 |
| 4389216 | Navy dye mixtures | Udo Bergmann, Guenter Hansen, Reinhold Krallmann, Wolf-Dieter Kermer | 1983-06-21 |
| 4386934 | Navy dye mixtures | Udo Bergmann, Guenter Hansen, Reinhold Krallmann, Wolf-Dieter Kermer | 1983-06-07 |