Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4292255 | Process for the preparation of organic polyisocyanates containing urea groups | Hans-Joachim Hennig, Peter Ziemek | 1981-09-29 |
| 4264519 | Process for the preparation of organic polyisocyanates containing biuret groups | Hans-Joachim Hennig, Peter Ziemek | 1981-04-28 |
| 4261918 | Process for the preparation of chloroformic acid methyl ester | Werner Schulte-Huermann, Jurgen Lahrs | 1981-04-14 |