Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7534781 | Crystalline amoxicillin trihydrate powder | Jan Willem Groenendaal, Thomas Van Der Does | 2009-05-19 |
| 5359058 | Cephem derivatives | Jan Verweij, Henri G. J. Hirs, Hendrik A. Witkamp, Jan J. DeKoning, Herman H. Grootveld | 1994-10-25 |
| 5164494 | Cephalosporin derivatives | Hendrik A. Witkamp, Jan J. DeKoning, Jan Verwej, Herman H. Grootveld | 1992-11-17 |
| 5164519 | Process for the separation of R and S-2,2-R.sub.1,R.sub.2 -1,3-dioxolane-4-carboxylic acid | HUBERTUS GERARDUS MARIA WALRAVEN, Paulus Bernardus Maria Groen | 1992-11-17 |
| 4921954 | Process for the preparation of cephem compounds | Hendrik A. Witkamp, Jan Verweij, Jan J. DeKoning, Herman H. Grootveld | 1990-05-01 |
| 4318852 | Sodium amoxicillin solvate | Herwarth Heitman, Johannes K. van der Drift, Herman H. Grootveld | 1982-03-09 |