Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5686233 | Bisresorcinyltriazines | Jean-Luc Birbaum, Vien Van Toan, Walter Knupp | 1997-11-11 |
| 5668200 | Stabilizer combination | Gerhard Rytz, Pascal Hayoz | 1997-09-16 |
| 5597854 | Latent light stabilizers | Jean-Luc Birbaum, Gerhard Rytz, Vien Van Toan, Norbert W urms | 1997-01-28 |