Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4762700 | Ammonium octamolybdate-alpha | — | 1988-08-09 |
| 4582512 | Chemical leaching of coal to remove ash, alkali and vanadium | Francis J. Smit, Mark Berggren, Kurt R. Anast | 1986-04-15 |
| 4552749 | Process for the production of molybdenum dioxide | Lawrence F. McHugh, Malcolm T. Hepworth, John M. Laferty | 1985-11-12 |
| 4544541 | Removal of hexavalent selenium from nickel, cobalt or copper sulfate solution | Eddie C. Chou, Ben W. Wiegers, Edward I. Wiewiorowski | 1985-10-01 |
| 4444733 | Process for recovering molybdenum and copper from sulfide concentrates | John M. Laferty, John D. Bruno | 1984-04-24 |
| 4443415 | Recovery of V.sub.2 O.sub.5 and nickel values from petroleum coke | Paul B. Queneau, Robert F. Hogsett, Leo W. Beckstead | 1984-04-17 |
| 4351808 | Autoclave soda digestion of scheelite concentrates | Leo W. Beckstead, Paul B. Queneau | 1982-09-28 |
| 4338287 | Process for conditioning tungsten concentrates | Robert F. Hogsett, Leo W. Beckstead | 1982-07-06 |
| 4328190 | Solvent extraction of tungsten from aqueous tungstate solutions | Leo W. Beckstead | 1982-05-04 |
| 4325919 | Autoclave soda digestion of scheelite concentrates with feedback control | Paul B. Queneau, Leo W. Beckstead | 1982-04-20 |
| 4320095 | Autoclave soda digestion of refractory scheelite concentrates | Paul B. Queneau, Leo W. Beckstead | 1982-03-16 |
| 4320096 | Combined autoclave soda digestion of wolframite and scheelite | Paul B. Queneau, Leo W. Beckstead | 1982-03-16 |
| 4313914 | Autoclave tungstate upgrading of scheelite concentrates | Paul B. Queneau, Leo W. Beckstead | 1982-02-02 |
| 4311679 | Treatment of sodium tungstate leach liquor containing dissolved silica, phosphorus, and fluorine impurities | Paul B. Queneau, Leo W. Beckstead | 1982-01-19 |
| 4303622 | Chemical treatment of low-grade wolframite concentrate having high Mo/WO.sub.3 ratio | Leo W. Beckstead, Paul B. Queneau | 1981-12-01 |
| 4303623 | Separation of trace molybdenum from tungstate solutions | Paul B. Queneau, Robert C. Ziegler, Leo W. Beckstead, Robert F. Hogsett | 1981-12-01 |