Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5663459 | Intermediates for the preparation of vitamin A and carotenoids and process for their preparation | Pierre Meilland | 1997-09-02 |
| 5639919 | Intermediates for the preparation of vitamin A and carotenoids and process for their preparation | — | 1997-06-17 |
| 5637779 | Process for the preparation of vitamin A and new intermediates | Jean-Erick Ancel | 1997-06-10 |