Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5633292 | Method for producing cold polyurethane foams | Anette Brune, Volker Zellmer | 1997-05-27 |
| 5614566 | Method for the preparation of rigid foams having urethane and/or isocyanurate groups and being extensively open celled | Helmut Schator | 1997-03-25 |