Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4525484 | Particulate polystyrene containing blowing agent and having improved expandability | Klaus Hahn, Paul Wittmer, Isidoor De Grave, Adolf Echte | 1985-06-25 |
| 4520135 | Particulate polystyrene containing blowing agent and having improved expandability | Klaus Hahn, Paul Wittmer, Isidoor De Grave, Adolf Echte | 1985-05-28 |
| 4513105 | Particulate polystyrene containing blowing agent and having improved expandability | Klaus Hahn, Paul Wittmer, Isidoor De Grave, Adolf Echte | 1985-04-23 |
| 4459373 | Pre-expanded plastic beads based on poly-para-methylstyrene | Klaus Hahn, Isidoor De Grave | 1984-07-10 |
| 4189515 | Particulate expandable styrene polymers having short minimum molding times | Harro Voss, Rolf Moeller, Erhard Stahnecker | 1980-02-19 |