Issued Patents 2003
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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 |