US3300147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concentration of beryllium ores
Assignee: MINERAL CONCENTRATES AND CHEMI
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Filing: 1963-11-08
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Granted: 1967-01-24
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Expires: 1983-11-08
Abstract
No abstract record available.
Inventors
- 👤 Theodore L Johnston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:49
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/02; B03D1/06
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
108 words
A PROCESS FOR THE CONCENTRATION OF BERYLLIUM MINERALS FROM AN ORE CONTAINING THEM ALONG WITH GANGUE MATERIALS WHICH COMPRISES: COMMINUTING THE ORE TO A PARTICLE SIZE BETWEEN ABOUT MINUS 50 AND MINUS 100 MESH; FORMING AN AQUEOUS PULP OF THE ORE HAVING A SOLIDS CONTENT FROM ABOUT 15 TO ABOUT 60 PERCENT; THOROUGHLY MIXING THE PULP WITH FROM ABOUT 4 TO ABOUT 6 POUNDS PER TON OF ORE OF AN ALKALINE CONDITIONING AGENT SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL HYDROXIDES, ALKALI METAL CARBONATES AND ALKALI METAL SULFIDES AT A PH BETWEEN ABOUT 9.5 AND 11 AT A TEMPERATURE BETWEEN ABOUT 55*C. TO 90*C.; ADDING A HIGHER
References Cited (Backward Citations)
US3078997A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-23 | 1970-07-25 | 1971-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-23 | 1974-07-25 | 1975-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-23 | 1978-07-25 | 1979-01-24 | $7700.00 | Window Closed / Lapsed |