Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5364605 | Recovery of cyanide from precious metal tailings | Henry A. Pfeffer | 1994-11-15 |
| 4656019 | Production of Phase II sodium tripolyphosphate | Paul L. Hensler, Frederick J. Kelso, Peter H. Zeh | 1987-04-07 |