Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4409189 | Recovery of tungsten from brines | S. Ralph Borrowman, Parkman T. Brooks | 1983-10-11 |
| 4241028 | Sorption of tungsten from alkaline solutions | S. Ralph Borrowman | 1980-12-23 |