Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6727291 | Preparation of expandable propylene polymer beads | Christian Maletzko, Isidor de Grave, Gerd Ehrmann, Franz-Josef Dietzen | 2004-04-27 |
| 6677040 | Expanded polypropylene particles | Frank Braun, Guiscard Glück, Isidoor De Grave, Hermann Tatzel | 2004-01-13 |