Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6552230 | Method for preparing 2-nitro-5-(phenylthio)-anilines | Volker Glock, Friedrich-Wilhelm Ullrich | 2003-04-22 |
| 5763641 | Process for the preparation of aromatic methoxycarboxylic acid methyl esters | Hans-Joachim Laakmann | 1998-06-09 |
| 5179211 | Process for the preparation of indoles | Heinz U. Blank, Friedrich-Wilhelm Ullrich, Karlheinrich Meisel, Nikolaus Schulz, Dieter Irmscher +1 more | 1993-01-12 |
| 4910345 | Process for the purification of nitrobenzaldenhyde | Heinz U. Blank | 1990-03-20 |
| 4873026 | Process for the preparation of 1-aminonaphthalene-2,4,7-trisulphonic acid and 1-aminonaphthalene-7-sulphonic acid | Horst Behre, Heinz U. Blank, Gerhard Marzolph | 1989-10-10 |
| 4836959 | Process for the preparation of 1-aminonaphthalene-2,4,7-trisulphonic acid and 1-aminonaphthalene-7-sulphonic acid | Gerhard Marzolph, Horst Behre, Heinz U. Blank | 1989-06-06 |
| 4568781 | Preparation of fluorine-substituted aromatic compounds | Franz Effenberger | 1986-02-04 |