Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5359058 | Cephem derivatives | Jan Verweij, Hendrik A. Witkamp, Everardus J. A. M. Leenderts, Jan J. DeKoning, Herman H. Grootveld | 1994-10-25 |
| 4695627 | Cephalosporin deoxygenation process | Jan Verweij, Herman H. Grootveld, Gerardus J. Van Veen, Jan Kalter, Peter W. Henniger | 1987-09-22 |