Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5804150 | Process for treating gold-containing sulfide ores | Walter Pierson, Eberhard Stolarski | 1998-09-08 |
| 5783158 | Process for treating sulfide ores containing gold and/or silver and as accompanying metal at least iron | Walter Pierson, Eberhard Stolarski | 1998-07-21 |
| 5387402 | Contact reactor for a quasi-isothermal catalytic oxidation of SO.sub.2 to SO.sub.3 and method of operating same | Peter Ahrens, Hugo Grimm, Heinz Neumann, Egon Winkler, Arend Werner +2 more | 1995-02-07 |
| 4333917 | Process of producing sulfuric acid | Karl-Heinz Dorr, Helmut Diekmann, Hugo Grimm, Ulrich Sander, Waldemar Weber | 1982-06-08 |