Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6149883 | Pressure oxidation process for the production of molybdenum trioxide from molybdenite | Victor John Ketcham, Wayne W. Hazen | 2000-11-21 |
| 6013382 | Apparatus and method for inhibiting the leaching of lead in water | Jerome P. Downey, Wayne C. Hazen, Paul B. Queneau | 2000-01-11 |
| 5660735 | Method for removing metals from waste solutions | Wayne C. Hazen | 1997-08-26 |
| 5632825 | Apparatus and method for inhibiting the leaching of lead in water | Jerome P. Downey, Wayne C. Hazen, Paul B. Queneau | 1997-05-27 |
| 5544859 | Apparatus and method for inhibiting the leaching of lead in water | Jerome P. Downey, Wayne C. Hazen, Paul B. Queneau | 1996-08-13 |
| 5536416 | Method for removing metals from a solution | Wayne C. Hazen | 1996-07-16 |
| 5399322 | Selective recovery of dissolved metals and preparation of metal salt products | — | 1995-03-21 |
| 5358700 | Method of extracting zinc from brines | Patrick M. Brown, Jerry Dobson, Eugenio Iasillo | 1994-10-25 |
| 5320759 | Selective recovery of heavy metals using xanthates | — | 1994-06-14 |
| 4708804 | Method for recovery of cyanide from waste streams | — | 1987-11-24 |
| 4606764 | Method of recovering metals from ores using a formate reducing agent | Wayne C. Hazen, John E. Litz, David L. Thompson | 1986-08-19 |
| 4244734 | Process for recovering metal values from materials containing arsenic | James E. Reynolds | 1981-01-13 |
| 4244735 | Chloride leach process for recovering metal values in the presence of arsenic | James E. Reynolds | 1981-01-13 |
| 4244927 | Process for recovering arsenic compounds by sodium hydroxide leaching | James E. Reynolds | 1981-01-13 |