Issued Patents All Time
Showing 25 most recent of 31 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12351536 | Process for obtaining isobutene from a C4-hydrocarbon mixture | Hans-Guenter Wagner, Suman Thotla, Gerrit Waters, Michael Huebner, Markus Neudert +1 more | 2025-07-08 |
| 9096497 | Process for preparing EDDN and EDMN | Hermann Luyken, Sebastian Ahrens, Gordon Brasche, Jens Baldamus, Robert Baumann +4 more | 2015-08-04 |
| 9012638 | Process for preparing EDDN and/or EDMN by conversion of FACH and EDA | Hermann Luyken, Sebastian Ahrens, Gordon Brasche, Jens Baldamus, Robert Baumann +4 more | 2015-04-21 |
| 8952156 | Process for working up reaction outputs from the hydrogenation of EDDN or EDMN | Hermann Luyken, Sebastian Ahrens, Gordon Brasche, Jens Baldamus, Robert Baumann +4 more | 2015-02-10 |
| 8946459 | Process for preparing EDDN and/or EDMN by reacting EDFA and/or EDMFA with HCN | Hermann Luyken, Sebastian Ahrens, Gordon Brasche, Jens Baldamus, Robert Baumann +4 more | 2015-02-03 |
| 8766029 | Process for providing a vaporous purified crude C4 cut as a feed steam for an extractive distillation with a selective solvent | Bernd Heida | 2014-07-01 |
| 8766010 | Method for distilling mixtures comprising ethylenediamine, N-methylethylenediamine, and water, and mixtures of ethylenediamine and N-methylethylenediamine having a low content of N-methylethylenediamine obtainable thereby | Michael Jödecke, Jörg Pastre | 2014-07-01 |
| 8642828 | Process for purifying a recycle stream from a 1,3-butadiene processing plant | Bernd Heida | 2014-02-04 |
| 8586795 | Methyl-substituted teta compounds | Johann-Peter Melder, Robert Baumann, Alfred Oftring, Boris Buschhaus, Gordon Brasche +2 more | 2013-11-19 |
| 8440852 | Method for producing tetraethylenepentamine | Kirsten Dahmen, Alfred Oftring, Thilo Hahn, Katrin Baumann, Johann-Peter Melder | 2013-05-14 |
| 8299249 | Method for producing TETA by means of EDDN | Kirsten Dahmen, Alfred Oftring, Katrin Baumann, Thilo Hahn, Johann-Peter Melder | 2012-10-30 |
| 8153845 | Method for producing aminonitriles | Alfred Oftring, Kirsten Dahmen, Thilo Hahn, Katrin Baumann, Johann-Peter Melder | 2012-04-10 |
| 8142618 | Processes for preparing pure xylylenediamine | Kirsten Dahmen, Sabine Huber | 2012-03-27 |
| 8088200 | Method for removing acid gases from a fluid stream | Rupert Wagner | 2012-01-03 |
| 7960590 | Method for producing ethyleneamines from untreated AAN | Kirsten Dahmen, Alfred Oftring, Thilo Hahn, Katrin Baumann, Johann-Peter Melder | 2011-06-14 |
| 7960591 | Method for producing triethylenetetramine | Kirsten Dahmen, Alfred Oftring, Katrin Baumann, Thilo Hahn, Johann-Peter Melder | 2011-06-14 |
| 7915454 | Method for producing ethylenediamine | Alfred Oftring, Kirsten Dahmen, Thilo Hahn, Katrin Baumann, Johann-Peter Melder | 2011-03-29 |
| 7880036 | Production method for ethyleneamine mixtures | Kirsten Dahmen, Alfred Oftring, Katrin Baumann, Thilo Hahn, Johann-Peter Melder | 2011-02-01 |
| 7880035 | Method for producing ethyleneamines | Alfred Oftring, Kirsten Dahmen, Thilo Hahn, Katrin Baumann, Johann-Peter Melder | 2011-02-01 |
| 7728174 | Continuous hydrogenation processes for the preparation of xylylenediamines | Kirsten Dahmen, Sabine Huber | 2010-06-01 |
| 7541497 | Method for producing xylylenediamine (XDA) | Sabine Jourdan, Kirsten Wenz, Thomas Preiss, Alexander Weck | 2009-06-02 |
| 7528284 | Method for producing xylylenediamine (XDA) | Sabine Jourdan, Kirsten Wenz, Thomas Preiss, Alexander Weck | 2009-05-05 |
| 7368610 | Preparation of xylylenediamine (XDA) | Sabine Jourdan, Kirsten Wenz, Thomas Preiss, Alexander Weck | 2008-05-06 |
| 7339080 | Method for the production of diaminoxylene by continuous hydrogenation of liquid phthalonitrile | Kirsten Wenz, Rolf Wambsganβ, Sabine Jourdan, Thomas Preiss | 2008-03-04 |
| 7323598 | Preparation of xylylenediamine (XDA) | Sabine Jourdan, Kirsten Wenz, Thomas Preiss, Alexander Weck | 2008-01-29 |