Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5360931 | Continuous multi-stage process for the preparation of (cyclo) aliphatic diisocyanates | Gerd Bohmholdt, Wilhelm Heitmann, Hans-Werner Michalczak | 1994-11-01 |
| 5087739 | Circulation process for the production of aliphatic and cycloaliphatic diisocyanates | Gerd Bohmholdt, Josef Disteldorf, Hans-Werner Michalczak | 1992-02-11 |
| 4986932 | Stabilizer system for polyolefins comprised of monocarboxylic acid esters of a piperidinol and a benzophenone or benzotriazole | Josef Disteldorf, Hans-Jurgen Haage, Hubert Libera | 1991-01-22 |