Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4592779 | Method for recovering precious metals from precious metal-bearing materials such as ore and tailings | John W. Smith | 1986-06-03 |
| 4539187 | Method for separating and recovering silica, aluminum and iron from fly ash, mineral ores and mine tailings | John W. Smith | 1985-09-03 |
| 4519921 | Methods for removing pollutants from water and waste water and for reducing sludge resistance to dewatering | John W. Smith, Janet S. Condra | 1985-05-28 |
| 4184852 | Method for making methane from metal carbides | — | 1980-01-22 |