Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4929374 | Lubricating oil composition | Feike De Jong, Willem Dannenberg | 1990-05-29 |
| 4832807 | Phosphorylation of alcohols | Feike De Jong | 1989-05-23 |
| 4715973 | Lubricating oil compositions | Feike De Jong | 1987-12-29 |