Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5097041 | Purification of 2-aryl-2H-benzotriazoles | Ariane Higel, Daniel Thibaut, Hans Horisberger | 1992-03-17 |
| 4922008 | Process for the production of 4-nitrotoluene-2-sulfonic acid | Gottfried Seifert, Josef H. Wieland, Willy Regenass, Martin Buerli, John G. Lee +1 more | 1990-05-01 |
| 4510100 | Process for the production of 2-amino-1-naphthalenesulfonic acid | Eric Plattner, Fred von Kaenel | 1985-04-09 |
| 4332939 | Process for the preparation of fluorinated s-triazines | Gottfried Seifert | 1982-06-01 |
| 4199529 | Process for the production of amino-I-acid | Bernt Bonath, Hans Horisberger, Istvan Szekely | 1980-04-22 |