Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5359058 | Cephem derivatives | Jan Verweij, Henri G. J. Hirs, Hendrik A. Witkamp, Everardus J. A. M. Leenderts, Herman H. Grootveld | 1994-10-25 |
| 5164494 | Cephalosporin derivatives | Hendrik A. Witkamp, Jan Verwej, Herman H. Grootveld, Everardus J. A. M. Leenderts | 1992-11-17 |
| 4994454 | Cepham derivatives | Jan Verweij, Hendrik A. Witkamp | 1991-02-19 |
| 4921954 | Process for the preparation of cephem compounds | Hendrik A. Witkamp, Jan Verweij, Herman H. Grootveld, Everardus J. A. M. Leenderts | 1990-05-01 |