Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6060542 | Bitumen compositions and a process for their preparation | Michael C. Phillips, Koen Steernberg | 2000-05-09 |
| 5939474 | Bitumen compositions and a process for their preparation | Michael C. Phillips, Koen Steernberg | 1999-08-17 |
| 4749622 | Structure coating method with asphaltic compositions | Willem C. Vonk | 1988-06-07 |