Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4716424 | Pressure-sensitive or heat-sensitive recording material | Jean C. Petitpierre, Hermann Nachbur | 1987-12-29 |
| 4453744 | Pressure-sensitive or heat-sensitive recording material | Christel Tempel | 1984-06-12 |
| 4439201 | Process for retanning leather with acrylic-based oligomers | Alain Lauton | 1984-03-27 |
| 4410331 | Condensation products containing sulphonic acid groups: additives for dyeing synthetic polyamide | Hans-Ulrich Berendt | 1983-10-18 |
| 4322372 | Condensation products containing sulphonic acid groups | Hans-Ulrich Berendt | 1982-03-30 |
| 4247293 | Sulphonated, aromatic reaction products, processes for their manufacture and their use as substances having a tanning action | — | 1981-01-27 |