Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5228885 | Process of concentrating a dilute sulfuric acid in a three-stage forced-circulation vacuum evaporation plant | Hartmut Wagner, Volker Wichert, Roland Fach, Gunter Okon | 1993-07-20 |