Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4340387 | Process for the dyeing of fibre material | David G. Evans, Willi Leutenegger | 1982-07-20 |
| 4329146 | Process for the dyeing of fibre material | Willi Leutenegger | 1982-05-11 |
| 4313733 | Assistant mixture for the dyeing or fluorescent brightening | Alain Lauton, Jean P. Luttringer | 1982-02-02 |
| 4274829 | Continuous dyeing process in organic solvent vapors | — | 1981-06-23 |
| 4270236 | Process for the dyeing of fibre material | Willi Leutenegger | 1981-06-02 |
| 4255154 | Process for the level dyeing of polyester material | Paul Dussy | 1981-03-10 |