Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4563256 | Solvent extraction process for recovery of zinc | R. Brantley Sudderth, Roy G. Lewis | 1986-01-07 |
| 4507268 | Solvent extraction | Gary A. Kordosky, Kenneth Mackay, R. Brantley Sudderth | 1985-03-26 |