Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4333917 | Process of producing sulfuric acid | Helmut Diekmann, Hugo Grimm, Ulrich Sander, Michael Tacke, Waldemar Weber | 1982-06-08 |
| 4330364 | Process of strengthening dilute phosphoric acid | Walter Blumrich, Hans-Joachim Konig, Ulrich Sander | 1982-05-18 |