Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6803024 | Benefication of titania slag by oxidation and reduction treatment | Jacobus Philippus Van Dyk, Nanne Mattheus Vegter, Cornelia Petronella Visser, Thomas De Lange, John D. Winter +1 more | 2004-10-12 |
| 5635152 | Acid regeneration | — | 1997-06-03 |
| 5595347 | Process for separating ilmenite | — | 1997-01-21 |