Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10125217 | Method for producing polyether carbonate polyols | Jörg Hofmann, Kai Laemmerhold, Hartmut Nefzger, Matthias Wohak, Stefanie Braun +3 more | 2018-11-13 |
| 9487616 | Lightly modified prepolymers and uses thereof | Manfred Schmidt, Reinhard Albers, Johannes Braak, Rolf Roers | 2016-11-08 |
| 9067864 | Process for producing aromatic amines | Knut Sommer, Ido Schwarz, Susanne Buchholz, Franz-Ulrich Von Gehlen, Andre Lago +4 more | 2015-06-30 |
| 8835591 | Method for preparing polyurethane prepolymers containing isocyanate groups | Manfred Schmidt, Robert Vieler, Ursula Tracht, Peter Weuta, Sigurd Buchholz | 2014-09-16 |
| 8022200 | Process for the preparation of liquid, storage-stable organic isocyanates of low color number containing carbodiimide and/or uretonimine groups | Stefan Wershofen, Manfred Schmidt, Nobuhiro Kamiyama, Shinichi Murakami, Tetsuo Harada | 2011-09-20 |
| 7745659 | Process for the production of liquid, storage-stable organic isocyanates with a low colour index having carbodiimide- and/or uretone imine groups | Stefan Wershofen, Manfred Schmidt, Torsten Hagen | 2010-06-29 |
| 7662634 | Method and device for determining the isomer composition in isocyanate production processes | Jochen Mahrenholtz, Andrea Wimschneider, Heinz Muller, Stefan Dresely, Jeffrey Bolton +4 more | 2010-02-16 |
| 7495124 | Process for the production of very pure 2,4′-methylenediphenyl diisocyanate | Jeffrey Bolton, Walter Meckel, Ulrich Wolf, Matthias Wintermantel, Jochen Mahrenholtz | 2009-02-24 |
| 7253321 | Process for the preparation of polyamines of the diphenylmethane series at a low degree of protonation | Torsten Hagen, Daniel Koch, Fritz Pohl, Stefan Wershofen, Rudolf Uchdorf +1 more | 2007-08-07 |
| 7041776 | Process for the production of polyisocyanates of the diphenylmethane series by phosgenation of non-neutralized polyamine of the diphenylmethane series | Daniel Koch, Torsten Hagen, Stefan Wershofen | 2006-05-09 |
| 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 | Ulrich Liman, Robert Vieler, Ralf Echterhoff | 2006-05-02 |
| 6649798 | Method for production of diaminodiphenylmethanes | Stephan Klein, Dirk Grotjohann, Christine Mendoza-Frohn, Daniel Koch, Heinz Muller +2 more | 2003-11-18 |
| 6528690 | Adiabatic process for producing dinitrotoluene | Uwe Klingler, Thomas Schieb, Dietmar Wastian | 2003-03-04 |
| 6054553 | Process for the preparation of polymers having recurring agents | Torsten Groth, Winfried Joentgen, Frank Dobert, Klaus-Peter Heise, Thomas Menzel +3 more | 2000-04-25 |
| 5679761 | Iminodisuccinate-containing polymers | Lutz Heuer, Winfried Joentgen, Torsten Groth, Hans-Joachim Traenckner, Nikolaus Muller +8 more | 1997-10-21 |
| 5616818 | Process for the polynitration of aromatic compounds | Reinhard Schom acker, Uwe Klingler, Thomas Schieb, Gerhard Wiechers, J urgen Zimmermann | 1997-04-01 |