Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6627172 | Process for preparing sulphuric acid from gases containing SO3 and gaseous nitrosylsulphuric acid | Hartmut Wagner | 2003-09-30 |
| 6238639 | Process for removing NOx from nitrosylsulphuric acid | Georg Schmidt, Egon Winkler, Hartmut Wagner, Ronald Apel, Dieter Knoblich +1 more | 2001-05-29 |
| 5228885 | Process of concentrating a dilute sulfuric acid in a three-stage forced-circulation vacuum evaporation plant | Hartmut Wagner, Volker Wichert, Klaus Engels, Gunter Okon | 1993-07-20 |