Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4225342 | Treatment of zinc plant leach residues for recovery of the contained metal values | George M. Freeman | 1980-09-30 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4225342 | Treatment of zinc plant leach residues for recovery of the contained metal values | George M. Freeman | 1980-09-30 |