Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5997719 | Electrochemical process for refining platinum group metals with ammonium chloride electrocyte | — | 1999-12-07 |
| 5269912 | Precious metal recovery system | — | 1993-12-14 |
| 5009755 | Refining method | — | 1991-04-23 |
| 4895626 | Process for refining and purifying gold | — | 1990-01-23 |
| 4612093 | Method and apparatus for purification of gold | — | 1986-09-16 |