Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4361675 | Compatible polystyrene blends | Jan L. de Greef | 1982-11-30 |
| 4251642 | Compatible polyurethane blends | Jan L. de Greef | 1981-02-17 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4361675 | Compatible polystyrene blends | Jan L. de Greef | 1982-11-30 |
| 4251642 | Compatible polyurethane blends | Jan L. de Greef | 1981-02-17 |