US2959281A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flotation of niobium-bearing minerals
Assignee: Technical Managers Inc
•
Filing: 1958-12-31
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Granted: 1960-11-08
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Expires: 1978-12-31
Abstract
No abstract record available.
Inventors
- 👤 Faucher J A Roland
- 👤 Dessureaux Silien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:50
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/016; B03D1/008; B03D1/01; B03D1/012; B03D2201/00; B03D2201/04; B03D2201/06; B03D2203/00; B03D2203/02; B03D2203/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A PROCESS FOR BENEFICIATING A MIXTURE OF MINERALS COMPRISING A LOW CONCENTRATION OF OXIDIZED NIOBIUM MINERALS DISPERSED IN A LARGE AMOUNT OF GANGUE, SAID MIXTURE BEING GROUND TO PARTICLE SIZES SUITABLE FOR FROTH FLOTATION FEED, WHICH COMPRISES FORMING AN AQUEOUS PULP OF SAID MIXTURE, SUBJECTING SAID AQUEOUS PULP TO FROTH FLOTATION IN THE PRESENCE OF A CATIONIC PROMOTER OF THE AMINE TYPE AND A SELECTIVE ACTIVATOR FOR THE NIOBIUM-BEARING MINERAL SELECTED FROM THE GROUP CONSISTING OF FLUORIDE AND FLUOSILICATE IONS, AND COLLECTING THE RESULTANT NIOBIUM-RICH FLOTATION CONCENTRATION, SEPARATELY FROM THE NIOBIUM-POOR FLOTATION TAILING.
Claim 2
Dependent Claim
93 words
A PROCESS FOR BENEFICIATING A MIXTURE OF MINERALS COMPRISING A LOW CONCENTRATION OF OXIDIZED NIOBIUM MINERALS DISPERSED IN A LARGE AMOUNT OF GANGUE, SAID MIXTURE BEING GROUND TO PARTICLE SIZES SUITABLE FOR FROTH FLOTATION FEED, WHICH COMPRISES FORMING AN AQUEOUS PULP OF SAID MIXTURE, SUBJECTING SAID AQUEOUS PULP TO FROTH FLOTATION IN THE PRESENCE OF A CATIONIC PROMOTER OF THE AMINE TYPE AND A SELECTIVE ACTIVATOR FOR THE NIOBIUM-BEARING MINERAL SELECTED FROM THE GROUP CONSISTING OF FLUORIDE AND FLUOSILICATE IONS, AND COLLECTING THE RESULTANT NIOBIUM-RICH FLOTATION CONCENTRATION, SEPARATELY FROM THE NIOBIUM-POOR FLOTATION TAILING.
References Cited (Backward Citations)
US2297689A
Cited
US2875896A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-08 | 1964-05-09 | 1964-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-08 | 1968-05-09 | 1968-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-08 | 1972-05-09 | 1972-11-08 | $7700.00 | Window Closed / Lapsed |