Patent US3014585A successfully refreshed from Google Patents.
US3014585A
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Flotation process for concentrating niobium-bearing minerals
Assignee: Individual
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Filing: 1959-06-18
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Granted: 1961-12-26
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Expires: 1979-06-18
Abstract
No abstract record available.
Inventors
- 👤 Harvey L Noblitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:05
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/002; B03D1/004; B03D1/01; B03D2201/00; B03D2201/02; B03D2203/00; B03D2203/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
IN A FLOTATION PROCESS FOR THE FLOTATION OF NIOBIUMBEARING MINERALS FROM AN ALKALINE ORE CONTAINING SAID MINERALS, THE STEP WHICH COMPRISES MODIFYING THE FLOTATION SOLUTION CONTAINING SAID ORE AND AS A COLLECTOR AT LEAST ONE OF THE GROUP CONSISTING OF MONOAMINES AND DIAMINES CONTAINING 14 TO 22 CARBON ATOMS IN THE MOLECULE, BY ADDING TO SAID SOLUTION AT LEAST ONE WATER-SOLUBLE BICARBONATE.
Claim 2
Dependent Claim
62 words
IN A FLOTATION PROCESS FOR THE FLOTATION OF NIOBIUMBEARING MINERALS FROM AN ALKALINE ORE CONTAINING SAID MINERALS, THE STEP WHICH COMPRISES MODIFYING THE FLOTATION SOLUTION CONTAINING SAID ORE AND AS A COLLECTOR AT LEAST ONE OF THE GROUP CONSISTING OF MONOAMINES AND DIAMINES CONTAINING 14 TO 22 CARBON ATOMS IN THE MOLECULE, BY ADDING TO SAID SOLUTION AT LEAST ONE WATER-SOLUBLE BICARBONATE.
References Cited (Backward Citations)
US1421585A
Cited
US2875896A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-12-25 | 1965-06-26 | 1965-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-25 | 1969-06-26 | 1969-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-25 | 1973-06-26 | 1973-12-26 | $7700.00 | Window Closed / Lapsed |