Issued Patents All Time
Showing 26–36 of 36 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5739343 | Nitro dyes | Gunther Lamm, Helmut Reichelt | 1998-04-14 |
| 5612465 | Phenylazotriazolopyridine dyestuffs | Ernst Schefczik, Ruediger Sens, Karl-Heinz Etzbach, Helmut Reichelt | 1997-03-18 |
| 5608041 | Azo dyestuffs containing a diazo component from the aniline series and coupling component from the triazolopyridine series | Ernst Schefczik, Volker Bach, Helmut Reichelt | 1997-03-04 |
| 5573585 | Molecular sieves containing azo dyes | Guenter Lauth, Wolfgang Hoelderich, Gerhard Wagenblast, Bernhard Albert, Gunther Lamm +2 more | 1996-11-12 |
| 5554782 | Preparation of dicyanobenzenes by ammonoxidation | Guenther Glas, Paul Guenthert, Helmut Reichelt, Rainer Becker, Arno Lange +1 more | 1996-09-10 |
| 5393308 | Mixtures of azo dyes for navy to black shades | Arno Lange, Volker Bach, Helmut Reichelt, Paul Anthony Richter | 1995-02-28 |
| 5347032 | Preparation of alkyl cyanoacetates | Helmut Reichelt | 1994-09-13 |
| 5342928 | Benzisothiazole- and benzothiophene-azo dyes with a coupling component of the aniline series | Thomas Roetsch, Helmut Hagen, Helmut Reichelt | 1994-08-30 |
| 5330543 | Thiopheneazo dyes with a coupling component of the diaminopyridine series | Guenter Hansen, Gunther Lamm, Hermann Loeffler, Helmut Reichelt, Helmut Degen +1 more | 1994-07-19 |
| 5306815 | Azo dyes with a coupling component of the quinoline series | Erwin Hahn, Andreas Geisberger, Helmut Reichelt, Andreas Guldner, Mathias Wiesenfeldt +3 more | 1994-04-26 |
| 5264560 | Preparation of quaternized azo dyes | Guenter Hansen, Johannes P. Dix, Helmut Reichelt | 1993-11-23 |