Issued Patents All Time
Showing 25 most recent of 27 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9027303 | Aqueous gypsum plaster-cement composition and its use | Hubert Lichtinger | 2015-05-12 |
| 8075673 | Absorption medium and method for removing carbon dioxide from gas streams | Joachim-Thierry Anders, Johann-Peter Melder, Norbert Asprion, Ole Brettschneider, Iven Clausen +1 more | 2011-12-13 |
| 7762404 | Device for performing the purifying separation of crystals out of their suspension in a contaminated crystal melt | Joerg Heilek, Dieter Baumann, Ulrich Hammon, Klaus Joachim Mueller-Engel | 2010-07-27 |
| 7540884 | Method for performing the purifying separation of crystals out their suspension in a mother liquor | Ulrich Hammon, Dieter Baumann, Joerg Heilek, Klaus Joachim Mueller-Engel | 2009-06-02 |
| 7393436 | Thermal separating process for removing at least one stream containing enriched (meth) acrylic monomers | Ulrich Hammon, Klaus Joachim Mueller-Engel, Juergen Schroeder, Joachim Thiel, Hans Martan | 2008-07-01 |
| 7323016 | Regulation of a wash column in a melt crystallization process | Jorg Heilek, Dieter Baumann | 2008-01-29 |
| 7319166 | Method of purifying a raw melt of at least one monomer by crystallization | Ulrich Hammon, Dieter Baumann, Joerg Heilek, Klaus Joachim Mueller-Engel | 2008-01-15 |
| 7307189 | Method for discontinuous purification of crude acrylic acid by means of crystallization | Dieter Baumann, Joerg Heilek, Klaus Joachim Mueller-Engel | 2007-12-11 |
| 7129376 | Method for the production of a purified melt of at least one monomer | Ulrich Hammon, Dieter Baumann, Joerg Heilek, Klaus Joachim Mueller-Engel | 2006-10-31 |
| 7112695 | Method for the purification of a crude acrylic acid melt | Dieter Baumann, Jorg Heilek, Klaus Joachim Müller-Engel | 2006-09-26 |
| 6921837 | Process for the purification and preparation of acrylic acid or methacrylic acid | Jorg Heilek, Dieter Baumann, Volker Schliephake | 2005-07-26 |
| 6852881 | Purification method for (meth)acrylic acid | Emile De Decker, Erik Bastiaensen, Dieter Baumann, Jorg Heilek | 2005-02-08 |
| 6703511 | Method for obtaining pure n-vinyl pyrrolidone | Jorg Heilek, Martin Schmidt-Radde, Herbert Helfert | 2004-03-09 |
| 6700016 | Method of purifying and producing acrylic acid or methacrylic acid | Jorg Heilek, Dieter Baumann, Volker Schliephake | 2004-03-02 |
| 6646161 | Method for the fractional condensation of a hot gas mixture containing acrylic acid or methacrylic acid and having a high proportion of non-condensable constituents | Otto Machhammer, Theo Proll, Volker Schliephake, Joachim Thiel, Klaus Bröllos | 2003-11-11 |
| 6596901 | Method for purifying acrylic acid and methacrylic acid | Otto Machhammer, Theo Proll, Volker Schliephake, Klaus Joachim Müller-Engel | 2003-07-22 |
| 6541665 | Method for purifying acrylic acid or methacrylic acid by crystallization and distillation | Erik Bastiaensen, Joachim Thiel | 2003-04-01 |
| 6448439 | Method for producing acrylic acid and methacrylic acid | Otto Machhammer, Theo Proll, Volker Schliephake, Joachim Thiel, Klaus Bröllos | 2002-09-10 |
| 6433222 | Method for producing acrylic acid | Jorg Heilek, Volker Schliephake, Theo Proll, Klaus Bröllos, Otto Machhammer +1 more | 2002-08-13 |
| 6414190 | Purification of acrylic acid by crystallization by means of vacuum evaporation | Jorg Heilek, Volker Schliephake | 2002-07-02 |
| 6242639 | Preparation of neopentyl glycol hydroxyprivalate granules | Hans-Jurgen Weyer, Dieter Baumann, Bernhard Maltry | 2001-06-05 |
| 6063959 | Purification of crude acrylic acid by crystallization | Klaus Lehnert, Klaus Joachim Müller-Engel, Gerhard Nestler | 2000-05-16 |
| 6051736 | Preparation of (meth)acrylic acid | Armin Schraut, Michael-Dieter Ulbrich, Freidrich-Georg Martin, Jorg Heilek | 2000-04-18 |
| 6026656 | Crystallization by evaporation and vapor condensation | Jorg Heilek | 2000-02-22 |
| 5831124 | Purification of acrylic acid and methacrylic acid | Otto Machhammer, Albrecht Dams, Theo Proll | 1998-11-03 |