Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11542223 | Process for preparing di- and polyamines of the diphenyl methane series | Dolan OConnor, Stefan Wershofen | 2023-01-03 |
| 10759736 | Process for the preparation of di- and polyamines of the diphenylmethane series | Stefan Wershofen, Georg Pirkl | 2020-09-01 |
| 10618871 | Process for producing isocyanate and at least one further chemical product in an integrated production | Jürgen Spriewald, Thomas Knauf | 2020-04-14 |
| 9701617 | Process for producing diamines and polyamines of the diphenylmethane series | Stefan Wershofen, Heinz Muller, Fritz Pohl, Knut Sommer | 2017-07-11 |
| 9416094 | Process for the preparation of di- and polyamines of the diphenylmethane series | Thomas Knauf, Wolfgang Lorenz, Stefan Wershofen, Karsten Becker | 2016-08-16 |
| 9309184 | Method for producing diamines and polyamines of the diphenylmethane series | Thomas Knauf, Wolfgang Lorenz, Stefan Wershofen, Karsten Becker | 2016-04-12 |
| 8318971 | Process for preparing methylenediphenyl diisocyanates | Fritz Pohl, Andreas Bulan, Rainer Weber, Matthias Böhm, Christian Six | 2012-11-27 |
| 7645900 | Process for the preparation of isocyanates | Wolfgang Lorenz, Matthias Boehm, Friedhelm Steffens, Anke Hielscher | 2010-01-12 |
| 7580899 | Offline code based reloading system | — | 2009-08-25 |
| 7528283 | Process for preparing diamines and polyamines from the diphenylmethane series | Fritz Pohl, Jeffrey Bolton, Heinz Muller, Rudolf Uchdorf | 2009-05-05 |
| 7312362 | Process for the production of di- and polyamines of the diphenylmethane series | Berthold Keggenhoff, Rudolf Uchdorf, Fritz Pohl | 2007-12-25 |
| 7253321 | Process for the preparation of polyamines of the diphenylmethane series at a low degree of protonation | Torsten Hagen, Daniel Koch, Hans-Georg Pirkl, Fritz Pohl, Stefan Wershofen +1 more | 2007-08-07 |
| 7216105 | Offline code based reloading system | — | 2007-05-08 |
| 7205439 | Process for the preparation of di- and polyamines of the diphenylmethane series | Torsten Hagen, Stefan Peter Grabowski, Daniel Koch, Stefan Wershofen | 2007-04-17 |