US3259242A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Beneficiation of apatite-calcite ores
Assignee: International Minerals and Chemical Corp
•
Filing: 1962-11-29
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Granted: 1966-07-05
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Expires: 1982-11-29
Abstract
No abstract record available.
Inventors
- 👤 Robert E Snow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:13
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/02; B03D1/021; B03D1/001; B03D1/004; B03D1/006; B03D1/008; B03D1/01; B03D2201/00; B03D2201/02; B03D2203/00; B03D2203/02; B03D2203/04; B03D2203/06; Y; Y10; Y10S; Y10S209/00; Y10S209/902
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
A FROTH FLOTATION PROCESS FOR BENEFICIATING A MACROCRYSTALLINE APATITE-CALCITE MIXTURE WHICH COMPRISES SUBJECTING A MIXTURE CONTAINING DISCRETE PARTICLES OF MACROCRYSTALLINE APATITE AND CALCITE TO CATIONIC FLOTATION AT A PH BELOW 7.0, AND SEPARATELY COLLECTING A MACROCRYSTALLINE APATITE, AS A FLOAT CONCENTRATE CONTAINING A SUBSTANTIALLY LOWER AMOUNT OF CALCITE AS COMPARED TO SAID MIXTURE AND A TAILING CONTAINING A SUBSTANTIALLY HIGHER AMOUNT OF CALCITE AS COMPARED TO SAID MIXTURE.
Claim 2
Dependent Claim
68 words
A FROTH FLOTATION PROCESS FOR BENEFICIATING A MACROCRYSTALLINE APATITE-CALCITE MIXTURE WHICH COMPRISES SUBJECTING A MIXTURE CONTAINING DISCRETE PARTICLES OF MACROCRYSTALLINE APATITE AND CALCITE TO CATIONIC FLOTATION AT A PH BELOW 7.0, AND SEPARATELY COLLECTING A MACROCRYSTALLINE APATITE, AS A FLOAT CONCENTRATE CONTAINING A SUBSTANTIALLY LOWER AMOUNT OF CALCITE AS COMPARED TO SAID MIXTURE AND A TAILING CONTAINING A SUBSTANTIALLY HIGHER AMOUNT OF CALCITE AS COMPARED TO SAID MIXTURE.
References Cited (Backward Citations)
US2105807A
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US2158220A
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US2313360A
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US3039197A
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GB859155A
Cited
US2959281A
Cited
US3063561A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-04 | 1970-01-03 | 1970-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-04 | 1974-01-03 | 1974-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-04 | 1978-01-03 | 1978-07-05 | $7700.00 | Window Closed / Lapsed |