Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5910212 | Process for preparing an open-graded asphalt composition | Dirk Adriaan Stoker | 1999-06-08 |
| 5888289 | Bitumen compositions and a process for their preparation | Koen Steernberg, Teunis Terlouw, Willem Cornelius Vonk | 1999-03-30 |
| 5743950 | Process for preparing an asphalt composition | Dirk Adriaan Stoker | 1998-04-28 |