Issued Patents 1982
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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 |
| 4320096 | Combined autoclave soda digestion of wolframite and scheelite | Paul B. Queneau, Leo W. Beckstead | 1982-03-16 |
| 4320095 | Autoclave soda digestion of refractory scheelite concentrates | 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 |