Issued Patents 1994
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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 |