Issued Patents 1994
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5275791 | Process for the leaching of gold and silver with cyanidic leaching solution and controlled addition of hydrogen peroxide | Helmut Knorre, Juergen Loroesch, Joachim Fischer | 1994-01-04 |