Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5910578 | Phenylazoanilines | Peter Saling, Erhard Klahr, Helmut Reichelt | 1999-06-08 |
| RE35407 | Azo dye polymers | Matthias Wiesenfeldt, Ruediger Sens, Karl-Heinz Etzbach, Heike Kilburg | 1996-12-17 |
| 5573585 | Molecular sieves containing azo dyes | Guenter Lauth, Wolfgang Hoelderich, Gerhard Wagenblast, Bernhard Albert, Gunther Lamm +2 more | 1996-11-12 |
| 5502170 | Azo dyes with an acetalized diazo component of the thiophene or thiazole series | Helmut Reichelt, Arno Lange, Helmut Degen | 1996-03-26 |
| 5466790 | Azo dyes with an acetalized diazo component of the thiophene or thiazole series | Helmut Reichelt, Arno Lange, Helmut Degen | 1995-11-14 |
| 5461131 | Azo dye polymers | Matthias Wiesenfeldt, Ruediger Sens, Karl-Heinz Etzbach, Heike Kilburg | 1995-10-24 |
| 5434231 | Azo dye polymers | Matthias Wiesenfeldt, Ruediger Sens, Karl-Heinz Etzbach, Heike Kilburg | 1995-07-18 |
| 5382263 | Blue dye mixtures of high brilliance | Helmut Degen, Arno Lange, Helmut Reichelt | 1995-01-17 |
| 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, Helmut Reichelt | 1994-12-27 |
| 5298610 | Thiazoleazo dyes having a coupling component of the diphenylamine series | Erwin Hahn, Matthias Wiesenfeldt, Helmut Reichelt | 1994-03-29 |
| 5264507 | Azo dye polymers | Matthias Wiesenfeldt, Ruediger Sens, Karl-Heinz Etzbach, Heike Kilburg | 1993-11-23 |