Issued Patents All Time
Showing 1–22 of 22 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6818191 | Autoclave control mechanisms for pressure oxidation of molybdenite | John E. Litz, Rong-Chien Wu | 2004-11-16 |
| 6730279 | Production of pure molybdenum oxide from low grade molybdeniteconcentrates | Robert W. Balliett, Wolfgang Kummer, John E. Litz, Lawrence F. McHugh, Harry H. K. Nauta +1 more | 2004-05-04 |
| 6013382 | Apparatus and method for inhibiting the leaching of lead in water | Enzo L. Coltrinari, Jerome P. Downey, Wayne C. Hazen | 2000-01-11 |
| 5632825 | Apparatus and method for inhibiting the leaching of lead in water | Enzo L. Coltrinari, Jerome P. Downey, Wayne C. Hazen | 1997-05-27 |
| 5544859 | Apparatus and method for inhibiting the leaching of lead in water | Enzo L. Coltrinari, Jerome P. Downey, Wayne C. Hazen | 1996-08-13 |
| 4627900 | Electrochemical dissolution and control of nickel sulfide scale | William G. Sherwood, Jean-Paul Duterque, Donald R. Hodges | 1986-12-09 |
| 4618480 | Recovery of alumina values from alunite ore | Wayne W. Hazen, David L. Thompson, James E. Reynolds, Nicholas J. Lombardo, John P. Hager | 1986-10-21 |
| 4450144 | Ammonium hydroxide stripping of tungsten from organic solvents | John M. Laferty, Leo W. Beckstead | 1984-05-22 |
| 4443415 | Recovery of V.sub.2 O.sub.5 and nickel values from petroleum coke | Robert F. Hogsett, Leo W. Beckstead, Dale K. Huggins | 1984-04-17 |
| 4415542 | Controlling scale composition during acid pressure leaching of laterite and garnierite ore | Robert E. Doane, Mark Berggren, Mark W. Cooperrider | 1983-11-15 |
| 4399109 | Control of silica scaling during acid leaching of lateritic ore | Ralph K. Iler, Mark W. Cooperrider | 1983-08-16 |
| 4397821 | Precipitation of synthetic scheelite | Leo W. Beckstead | 1983-08-09 |
| 4351808 | Autoclave soda digestion of scheelite concentrates | Leo W. Beckstead, Dale K. Huggins | 1982-09-28 |
| 4342728 | Process for digesting tungsten ores containing organic matter | Leo W. Beckstead, Robert F. Hogsett | 1982-08-03 |
| 4325919 | Autoclave soda digestion of scheelite concentrates with feedback control | Leo W. Beckstead, Dale K. Huggins | 1982-04-20 |
| 4320096 | Combined autoclave soda digestion of wolframite and scheelite | Dale K. Huggins, Leo W. Beckstead | 1982-03-16 |
| 4320095 | Autoclave soda digestion of refractory scheelite concentrates | Dale K. Huggins, Leo W. Beckstead | 1982-03-16 |
| 4313914 | Autoclave tungstate upgrading of scheelite concentrates | Dale K. Huggins, Leo W. Beckstead | 1982-02-02 |
| 4311679 | Treatment of sodium tungstate leach liquor containing dissolved silica, phosphorus, and fluorine impurities | Leo W. Beckstead, Dale K. Huggins | 1982-01-19 |
| 4303622 | Chemical treatment of low-grade wolframite concentrate having high Mo/WO.sub.3 ratio | Dale K. Huggins, Leo W. Beckstead | 1981-12-01 |
| 4303623 | Separation of trace molybdenum from tungstate solutions | Dale K. Huggins, Robert C. Ziegler, Leo W. Beckstead, Robert F. Hogsett | 1981-12-01 |
| 4183792 | Method and cell for electrolytic oxidation of Ni(OH).sub.2 with stationary bed electrode | Willam G. Sherwood | 1980-01-15 |