Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4956126 | Metal-oxide-silica adsorbent and process for refining oil using the same | Jan C. Vis, Jan W. Groeneweg | 1990-09-11 |
| 4812436 | Metal-oxide-silica adsorbent for bleaching and refining oil | Jan C. Vis, Jan W. Groeneweg | 1989-03-14 |
| 4665048 | Catalyst suitable for hydrotreating | Willem A. Van Leeuwen, Eduard K. Poels, Dirk Verzijl | 1987-05-12 |