Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9290431 | Process for preparation of highly pure, non-yellowing methacrylic acid | Zhengfeng Zhang, Gerhard Koelbl, Lorenza Sartorelli, Huisheng Wang, Mirko Michel | 2016-03-22 |
| 8791296 | Process for preparing methacrylic acid | Dirk Broell, Hermann Siegert, Thomas Krauss | 2014-07-29 |
| 8461375 | Method for the continuous production of alkyl(meth)acrylates with multiple catalyst recycling | Jochen Ackerman, Hermann Siegert | 2013-06-11 |
| 6977310 | Method for the continuous production of alkyl (meth)acrylates | Jochen Ackermann, Udo Gropp, Hans-Rolf Rausch, Ingrid Lunt-Rieg, Hermann Siegert +1 more | 2005-12-20 |