Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5360931 | Continuous multi-stage process for the preparation of (cyclo) aliphatic diisocyanates | Wilhelm Heitmann, Peter Kirchner, Hans-Werner Michalczak | 1994-11-01 |
| 5087739 | Circulation process for the production of aliphatic and cycloaliphatic diisocyanates | Josef Disteldorf, Peter Kirchner, Hans-Werner Michalczak | 1992-02-11 |