Issued Patents 1982
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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 |