Issued Patents All Time
Showing 26–32 of 32 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4407762 | Process for the isolation of 1-naphthylamine-4,8-disulphonic acid | Heinz U. Blank, Hans W. Linden, Werner Mentzel | 1983-10-04 |
| 4377535 | Process for the preparation of nitro-T-acid (8-nitro-naphthalene-1,3,6-trisulphonic acid) | Reinhard Kaiser, Jurgen Dammann, Rolf Putter, Axel Vogel | 1983-03-22 |
| 4369143 | Process for the preparation of naphthalene-1,3,5-trisulphonic acid | Heinz U. Blank, Wolfgang Schenk | 1983-01-18 |
| 4348334 | Process for producing the magnesium salt of 3-nitro-naphthalene-1,5-disulfonic acid (nitro-Armstrong's acid) | Bernhard Albrecht, Hans-Helmut Frey, Vinzenz Habermacher, Lutz Kienitz, Wolfgang Schenk +2 more | 1982-09-07 |
| 4348336 | Process for the isolation of 1-naphthylamine-4,6- and 1-naphthylamine-4,7-disulphonic acid | Heinz U. Blank, Hans W. Linden | 1982-09-07 |
| 4338261 | Process for the preparation of 1-naphthylamine-4,6-disulphonic acid and 1-naphthylamine-2,4,6-trisulphonic acid | Heinz U. Blank, Hans W. Linden, Werner Mentzel | 1982-07-06 |
| 4325889 | Process for the preparation of 1-amino-8-naphthol-3,6-disulphonic acid (H-acid) | Albert Hullen, Bruno Kruger, Guido Steffan | 1982-04-20 |