Issued Patents 1994
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5376150 | Use of pyridine dyes in the textile sector, dye mixtures with pyridine dyes, and triazolopyridine dyes having a thienyl radical | Arno Lange, Volker Bach, Ruediger Sens, Karl-Heinz Etzbach, Sabine Gruettner-Merten | 1994-12-27 |
| 5364972 | Preparation of nitrobenzophenones, and a color-stable modification of a benzophenone-azopyridone dye | Helmut Degen, Norbert Zimmerman, Ralf Brueckmann, Gunther Lamm, Arno Lange | 1994-11-15 |
| 5352774 | Dyes containing thiophene radicals | Guenter Hansen, Ernst Schefczik, Karl-Heinz Etzbach, Hermann Loeffler | 1994-10-04 |
| 5347032 | Preparation of alkyl cyanoacetates | Clemens Grund | 1994-09-13 |
| 5342928 | Benzisothiazole- and benzothiophene-azo dyes with a coupling component of the aniline series | Thomas Roetsch, Helmut Hagen, Clemens Grund | 1994-08-30 |
| 5330543 | Thiopheneazo dyes with a coupling component of the diaminopyridine series | Guenter Hansen, Gunther Lamm, Hermann Loeffler, Helmut Degen, Arno Lange +1 more | 1994-07-19 |
| 5306815 | Azo dyes with a coupling component of the quinoline series | Erwin Hahn, Clemens Grund, Andreas Geisberger, Andreas Guldner, Mathias Wiesenfeldt +3 more | 1994-04-26 |
| 5298610 | Thiazoleazo dyes having a coupling component of the diphenylamine series | Erwin Hahn, Matthias Wiesenfeldt, Sabine Gruettner-Merten | 1994-03-29 |
| 5298592 | Preparation of polyaryl ethers with nitrogen compound catalysts | Alexander Aumueller, Wolfgang Eberle, Gerhard Heinz, Bernd Hupfeld, Christiane Husemann +1 more | 1994-03-29 |
| 5283326 | Dyes containing thiophene radicals | Guenter Hansen, Ernst Schefczik, Karl-Heinz Etzbach, Hermann Loeffler | 1994-02-01 |