Issued Patents 2004
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6809224 | Method for the separation of formaldehyde from a reaction mixture containing polyols by the addition of solvents before and/or during the distillation | Matthias Dernbach, Detlef Kratz, Achim Stammer | 2004-10-26 |
| 6740726 | Polyisocyanates as coating components for coating means rich in solids | Jochem Henkelmann, Heiko Maas, Armin Stamm, Heinz-Peter Rink, Werner-Alfons Jung +1 more | 2004-05-25 |
| 6692616 | Method for purifying trimethylolpropane, which is produced by hydrogenation, by means of continuous distillation | Matthias Dernbach, Detlef Kratz, Achim Stammer, Harald Rust | 2004-02-17 |