Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9108847 | Method and plant for reprocessing waste sulphuric acids from nitration processes | Harald Steeg | 2015-08-18 |
| 7988942 | Method and system for concentrating waste sulphuric acids from nitration processes | Ulrich Walter | 2011-08-02 |
| 7234692 | Column tray | Ulrich Walter | 2007-06-26 |
| 6969446 | Method for producing concentrated nitric acid and installation for carrying out a method of this type | Frank Dorstewitz, Manfred Sassenberg, Ulrich Walter | 2005-11-29 |
| 6726188 | Structured mass transfer packing with improved baffles | Steffen Dietl | 2004-04-27 |