Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8110704 | Process for the production of stable polymers | James-Michael Barnes, Hartmut Nefzger, Erika Bauer, Thomas W. Schultz, Heinrich Lutz +2 more | 2012-02-07 |
| 6486346 | Process for the preparation of durene diisocyanate | Peter Heitkamper, Klaus Jost | 2002-11-26 |
| 5663439 | Process for the preparation of toluidines | Peter Heitkamper | 1997-09-02 |
| 5552507 | Diisocyanates and processes for their production and use | Christian Wamprecht, Klaus Jost | 1996-09-03 |
| 5399736 | Process for the preparation of highly pure aromatic diurethanes and/or polyurethanes | Wolfgang Friederichs, Stefan Wershofen | 1995-03-21 |
| 4879409 | Cycloaliphatic diisocyanates, optionally in the form of isomeric mixtures and a process for their preparation | Hartmut Knofel, Michael Brockelt, Herbert Stutz | 1989-11-07 |
| 4879408 | Cycloaliphatic diisocyanates optionally in the form of isomer mixtures and a process for their production | Hartmut Knofel, Michael Brockelt, Herbert Stutz | 1989-11-07 |
| 4786751 | Dissocyanates, diisocyanate mixtures and a process for their production | Hartmut Knofel, Michael Brockelt, Herbert Stutz | 1988-11-22 |
| 4720582 | Diamines and a process for their production | Hartmut Knofel, Michael Brockelt | 1988-01-19 |
| 4675437 | Cycloaliphatic triisocyanates | Hartmut Knofel, Michael Brockelt, Gunter Hammen, Herbert Stutz | 1987-06-23 |
| 4603189 | Triisocyanates and a process for their preparation | Hartmut Knofel, Michael Brockelt, Gunter Hammen, Herbert Stutz | 1986-07-29 |
| 4593117 | Process for the preparation of N- and O-substituted diurethanes and/or polyurethanes | Hartmut Knofel, Gunther Hammen, Peter Heitkamper | 1986-06-03 |
| 4480110 | Process for the preparation of urethanes | Peter Heitk/a/ mper, Rudolf Fauss, Kurt Findeisen, Hans-Joachim Scholl | 1984-10-30 |