Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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, Dieter Dieterich | 1989-01-10 |