Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6251414 | Aqueous formulation for pretanning raw hides | Markus Hess, Gunter Streicher, Alois Puntener | 2001-06-26 |
| 6033590 | Compositions for the preparation of leather | Reiner Komforth | 2000-03-07 |
| 5733340 | Aqueous composition for the pretanning of hide pelts or retanning of leather | — | 1998-03-31 |
| 5558675 | Process for aftertreating tanned leather and pelts | — | 1996-09-24 |
| 5427594 | Process for pickling raw hides | Markus Hess, Gunter Streicher, Alois Puntener | 1995-06-27 |
| 5360453 | Process for pickling and pretanning raw hides | Markus Hess, Gunter Streicher, Alois Puntener | 1994-11-01 |
| 5264000 | Aqueous solutions of synthetic tanning agents | Alois Puntener | 1993-11-23 |
| 5256317 | Compositions for the treatment of leather and furs | — | 1993-10-26 |
| 4830632 | Aqueous composition from a sulfonated phenol, an amine and a tanning salt, process for the production thereof and use thereof as a tanning agent | — | 1989-05-16 |
| 4514186 | Aqueous formulations of water-insoluble or sparingly water-soluble dyes and hypophosphite/unsaturated acid teldmer | Zdenek Koci | 1985-04-30 |
| 4439201 | Process for retanning leather with acrylic-based oligomers | Albert Wurmli | 1984-03-27 |
| 4386965 | Process for obtaining coating compositions of improved whiteness | Werner Fringeli, Max Flubacher | 1983-06-07 |
| 4339238 | Stable aqueous formulations of stilbene fluorescent whitening agents | Werner Fringeli | 1982-07-13 |
| 4313733 | Assistant mixture for the dyeing or fluorescent brightening | Jacques Zurbuchen, Jean P. Luttringer | 1982-02-02 |
| 4202838 | Sulphonated condensation products | Roland Putzar, Hans-Ulrich Berendt, Gustaaf Scherer | 1980-05-13 |