Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8835591 | Method for preparing polyurethane prepolymers containing isocyanate groups | Hans-Georg Pirkl, Manfred Schmidt, Ursula Tracht, Peter Weuta, Sigurd Buchholz | 2014-09-16 |
| 7205430 | Production of di- and polyisocyanates of the diphenylmethane series with defined acidity | Ulrich Liman, Heinz Muller, Ralf Echterhoff | 2007-04-17 |
| 7038002 | Production of mixtures of diisocyanates and polyisocyanates from the diphenylmethane series with high contents of 4,4′-methylenediphenyl diisocyanate and 2,4′-methylenediphenyl diisocyanate | Hans-Georg Pirkl, Ulrich Liman, Ralf Echterhoff | 2006-05-02 |