Issued Patents All Time
Showing 25 most recent of 60 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6130320 | Acid disazo dyes as well as sulphonamides as their intermediate product | Helmut Reichelt, Gerhard Wagenblast | 2000-10-10 |
| 6069144 | N-heterocyclic compounds, intermediate products used to prepare them, agents containing them and their use in antifungal applications | Oliver Wagner, Frank Wetterich, Karl Eicken, Michael Rack, Gerhard Hamprecht +4 more | 2000-05-30 |
| 6028179 | Trisazo dyes | Gerhard Scholz | 2000-02-22 |
| 6013775 | Polyazo dyes containing a plurality of hydroxy sulfonyl groups | Matthias Wiesenfeldt | 2000-01-11 |
| 6011141 | Acid polyazo dyes | Helmut Reichelt, Matthias Wiesenfeldt | 2000-01-04 |
| 5972050 | Dye mixtures containing polyazo dyes and CI Sulphur Black 1 dye | Matthias Wiesenfeldt, Johannes P. Dix, Rolf Streicher, Manfred Herrmann | 1999-10-26 |
| 5929245 | Naphtholactam dyes | Clemens Grund, Ernst Schefczik, Roland Merger, Rudiger Sens | 1999-07-27 |
| 5834602 | Acid disazo dyes | Helmut Reichelt | 1998-11-10 |
| 5739343 | Nitro dyes | Helmut Reichelt, Clemens Grund | 1998-04-14 |
| 5738693 | Detection of naphthylamines in mineral oils | Rainer Dyllick-Brenzinger, Ulrike Schlosser, Walter Kurtz | 1998-04-14 |
| 5623060 | Dye mixture containing at least four diazo dyes having the same color with a diaminopyridine coupling component | Hermann Loeffler, Helmut Reichelt | 1997-04-22 |
| 5621107 | Sulfopyridones and a process of making therefor | Helmut Reichelt, Matthias Wiesenfeldt | 1997-04-15 |
| 5573585 | Molecular sieves containing azo dyes | Guenter Lauth, Wolfgang Hoelderich, Gerhard Wagenblast, Bernhard Albert, Helmut Reichelt +2 more | 1996-11-12 |
| 5554737 | Doubled acid azo dyes with a hydroxypyridone coupling component | Helmut Reichelt, Matthias Wiesenfeldt | 1996-09-10 |
| 5547477 | Dye mixtures with pyridoneazo dyes | Arno Lange, Helmut Degen, Helmut Reichelt, Dieter Wegerle | 1996-08-20 |
| 5536840 | Process of preparing diaminopyridine compounds | Hermann Loeffler, Helmut Reichelt | 1996-07-16 |
| 5510468 | Amino benzophenone dye | Helmut Reichelt, Ortwin Schaffer | 1996-04-23 |
| 5484460 | Dye mixtures containing azo dyes having a coupling component from the diaminopyridine series | Hermann Loeffler, Volker Bach, Arno Lange, Helmut Reichelt, Herbert Rothmaier | 1996-01-16 |
| 5470959 | Polyazo dyes having a diazo component of the aminobenzophenone series | Udo Mayer, Helmut Reichelt, Georg Zeidler | 1995-11-28 |
| 5411556 | Dyeing leather with a red azo dye | Johannes P. Dix, Helmut Reichelt, Georg Zeidler | 1995-05-02 |
| 5403363 | Dye mixtures containing azo dyes having a coupling component from the diaminopyridine series | Hermann Loeffler, Volker Bach, Arno Lange, Helmut Reichelt, Herbert Rothmaier | 1995-04-04 |
| RE34877 | Azo dyes for thermotransfer printing | Volker Bach, Karl-Heinz Etzbach, Sabine Gruettner, Helmut Reichelt, Ruediger Sens | 1995-03-14 |
| 5389596 | Dye mixtures for dye transfer | Karl-Heinz Etzbach, Ruediger Sens | 1995-02-14 |
| 5389110 | Azo dyes and process of dyeing with azo dyes which contain an N-(hydroxysulfonylphenylalkyl)pyridone coupling component | Johannes P. Dix, Bernd Hupfeld, Helmut Reichelt | 1995-02-14 |
| 5380859 | Pyridone compounds and the preparation of disulfonated pyridone compounds | Helmut Beichelt, Ortwin Schaffer | 1995-01-10 |