Issued Patents All Time
Showing 51–54 of 54 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6667370 | Method for producing prepolymers containing isocyanate end groups, incorporating a small proportion of base isocyanates | James-Michael Barnes, Manfred Schmidt, Andreas Hoffmann | 2003-12-23 |
| 6639102 | Process for producing polyisocyanates of the diphenyl methane series having a reduced color value | Torsten Hagen, Friedhelm Kamper, Daniel Koch, Rudolf Uchdorf | 2003-10-28 |
| 5399736 | Process for the preparation of highly pure aromatic diurethanes and/or polyurethanes | Wolfgang Friederichs, Stefan Penninger | 1995-03-21 |
| 5347034 | Process for the production of poly(O-alkylurethanes) of the diphenyl methane series | Gunter Hammen, Thomas Schieb | 1994-09-13 |