Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5684092 | Production of rigid foams based on isocyanate | Renate Hempel, Gottfried Knorr, Udo Rotermund | 1997-11-04 |
| 5670554 | Production of CFC-free polyurethane rigid foams having a reduced thermal conductivity and their use | Stefan Adams | 1997-09-23 |
| 5624969 | Production of rigid foams based on isocyanate | Renate Hempel, Gottfried Knorr, Udo Rotermund | 1997-04-29 |