Issued Patents 1982
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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 |