Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4870206 | Aromatic polyisocyanates, their preparation and use as components for adhesives | Josef Sanders, Rudolf Hombach, Helmut Reiff, Manfred Dollhausen | 1989-09-26 |
| 4797427 | Aromatic diamines containing sulfonic acid aryl esters, a process for their production and their use in the production of polyurethane plastics | Josef Sanders, Helmut Reiff, Gerhard Balle | 1989-01-10 |