Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4227996 | Flotation process for improving recovery of phosphates from ores | Walter Von Drathen | 1980-10-14 |
| 4198288 | Desliming of potash ores | Walter Von Drathen | 1980-04-15 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4227996 | Flotation process for improving recovery of phosphates from ores | Walter Von Drathen | 1980-10-14 |
| 4198288 | Desliming of potash ores | Walter Von Drathen | 1980-04-15 |