Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4870206 | Aromatic polyisocyanates, their preparation and use as components for adhesives | Rudolf Hombach, Helmut Reiff, Dieter Dieterich, Manfred Dollhausen | 1989-09-26 |
| 4820866 | Process for the production of diisocyanates, selected diisocyanates produced thereby and the production of polyurethane plastics therefrom | — | 1989-04-11 |
| 4797427 | Aromatic diamines containing sulfonic acid aryl esters, a process for their production and their use in the production of polyurethane plastics | Helmut Reiff, Gerhard Balle, Dieter Dieterich | 1989-01-10 |