Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5670061 | Process for treating ash | Wolfgang Kowallik, Werner Soyez | 1997-09-23 |
| 5628911 | Filtration of soot/ash water slurries and improved partial oxidation process for hydrocarbon feedstocks | Wolfgang Kowallik, Thomas Schmitz | 1997-05-13 |