Issued Patents 1997
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5698603 | Expandable styrene polymers containing recycled material | Klaus Hahn, Michael Witt, Maria Lorenz | 1997-12-16 |
| 5616624 | Preparation of bead-form expandable styrene polymers having improved expandability | Michael Witt, Klaus Hahn, Dieter Naegele | 1997-04-01 |
| 5597885 | Preparation of chlorofluorocarbon-free flexible polyurethane foams using diphenylmethane diisocyanate-based polyisocyanate mixtures containing urethane groups, and modified polyisocyanate mixtures | Heinz-Dieter Lutter, Bernd Bruchmann, Claudia Spang, Roland Minges, Michael Lugmayr +1 more | 1997-01-28 |
| 5596045 | Expandable styrene polymers containing recycled material | Wolfram Husemann, Michael Witt, Klaus Hahn, Knut Kaempfer, Gerhard Alicke | 1997-01-21 |
| 5596063 | Preparation of chlorofluorocarbon-free flexible polyurethane foams using diphenylmethane diisocyanate-based polyisocyanate mixtures containing urethane groups, and modified polyisocyanate mixtures of this type | Heinz-Dieter Lutter, Bernd Bruchmann, Claudia Spang, Roland Minges, Michael Lugmayr +1 more | 1997-01-21 |
| 5591778 | Process for the preparation of expandable polystyrene | Klaus Hahn, Anthony G. Schaefer, Bernhard Schmied | 1997-01-07 |