Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8530678 | Trioxane production method wherein a side aqueous flow is deducted at a first distillation stage | Markus Siegert, Eckhard Stroefer, Achim Stammer, Thorsten Friese | 2013-09-10 |
| 8450507 | Integrated method for the preparation of trioxane from formaldehyde | Markus Siegert, Eckhard Stroefer, Christoph Sigwart | 2013-05-28 |
| 8378144 | Process for preparing polyoxymethylene homopolymers or copolymers by homopolymerization or copolymerization of trioxane, starting from methanol | Markus Siegert, Tobias Kortekamp, Eckhard Stroefer, Christoph Sigwart | 2013-02-19 |
| 8372993 | Method for separating trioxane from a trioxane/formaldehyde/water mixture by means of pressure change rectification | Joachim Thiel, Eckhard Stroefer, Julia Kirschbaum, Markus Siegert | 2013-02-12 |
| 8350063 | Method for separating tioxane from a trioxane/formaldehyde/water mixture by means of pressure change rectification | Markus Siegert, Laszlo Szarvas, Christoph Sigwart, Franz Niklaus Windlin, Eckhard Stroefer | 2013-01-08 |
| 7754900 | Method for the production of dioxolane | Markus Siegert, Eckhard Stroefer, Achim Stammer | 2010-07-13 |
| 7713387 | Method for separating trioxane from a trioxane/formaldehyde/water mixture by means of pressure change rectification | Markus Siegert, Eckhard Ströfer, Achim Stammer, Thorsten Friese, Hans Hasse | 2010-05-11 |
| 7414159 | Separation of liquid mixtures in a film evaporator | Eckhard Stroefer, Ute Lichtfers, Ulrich Steinbrenner, Hans Hasse | 2008-08-19 |
| 7390932 | Method for preparing highly concentrated, gaseous formaldehydes | Eckard Stroefer, Ulrich Steinbrenner, Hans Hasse, Michael Ott, Thomas Grützner | 2008-06-24 |
| 7381851 | Method for producing formaldehyde | Gerhard Olbert, Thorsten Johann, Markus Weber, Eckhard Ströfer, Martin Fiene +1 more | 2008-06-03 |
| 7345207 | Production of high-concentration formaldehyde solutions | Eckhard Stroefer, Hans Hasse, Thomas Grützner, Michael Ott | 2008-03-18 |
| 7342139 | Method for producing highly concentrated formaldehyde solution | Bernd Rumpf, Eckhard Ströfer, Ortmund Lang | 2008-03-11 |