Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5266693 | 6-diazo-penicillanic acid 1,1-dioxide derivatives | Johannes K. van der Drift | 1993-11-30 |
| 4695627 | Cephalosporin deoxygenation process | Jan Verweij, Herman H. Grootveld, Henri G. J. Hirs, Gerardus J. Van Veen, Jan Kalter | 1987-09-22 |
| 4619786 | Preparation of 6-.alpha.-bromo- and/or 6,6-dibromo-penicillanic acid-1,1-dioxides | Johannes K. van der Drift | 1986-10-28 |
| 4528135 | Process for the preparation of penicillanic acid 1,1-dioxides | Johannes K. van der Drift, Jagdish C. Kapur, Herman P. Fasel | 1985-07-09 |
| 4358588 | Process for preparing cephalosporanic acid compounds | Johannes K. van der Drift, Gerard J. van Veen, Jagdish C. Kapur | 1982-11-09 |