Patent US3113838A successfully refreshed from Google Patents.
US3113838A
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Process for enriching of phosphoric anhydride phosphate minerals containing calcium carbonate
Assignee: MOUTECATINI GENERALE P Soc
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Filing: 1959-07-06
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Granted: 1963-12-10
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Expires: 1979-07-06
Abstract
No abstract record available.
Inventors
- 👤 Perri Giovanni
- 👤 Tubiello Giuseppe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:55
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/02; B03D1/021; C; C05; C05B; C05B11/00; C05B11/02; Y; Y10; Y10S; Y10S209/00; Y10S209/902
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A PROCESS FOR BENEFICIATING PHOSPHATE ROCK, CONTAINING CALCIUM CARBONATE, BY FROTH FLOTATION, COMPRISING GRINDING THE ROCK TO A FINENESS SUCH THAT CALCIUM PHOSPHATE GRANULES ARE DETACHED FROM CALCIUM CARBONATE GRANULES, SUSPENDING THE FINELY GROUND ROCK IN AN AQUEOUS SOLUTION OF A SOLUBLE PHOSPHATE TAKEN FROM THE CLASS CONSISTING OF SODIUM, POTASSIUM AND AMMONIUM PHOSPHATES, AND ADDING AN ANIONIC FLOATATION AGENT ACTING AS COLLECTOR FOR THE CALCIUM CARBONATE GRANULES, SUBJECTING THE MIXTURE TO FROTH FLOTATION, A MAJOR AMOUNT OF THE CALCIUM CARBONATE BEING REMOVED IN THE FROTH, THE RESIDUE BEING THEREBY ENRICHED IN P2O5.
Claim 2
Dependent Claim
93 words
A PROCESS FOR BENEFICIATING PHOSPHATE ROCK, CONTAINING CALCIUM CARBONATE, BY FROTH FLOTATION, COMPRISING GRINDING THE ROCK TO A FINENESS SUCH THAT CALCIUM PHOSPHATE GRANULES ARE DETACHED FROM CALCIUM CARBONATE GRANULES, SUSPENDING THE FINELY GROUND ROCK IN AN AQUEOUS SOLUTION OF A SOLUBLE PHOSPHATE TAKEN FROM THE CLASS CONSISTING OF SODIUM, POTASSIUM AND AMMONIUM PHOSPHATES, AND ADDING AN ANIONIC FLOATATION AGENT ACTING AS COLLECTOR FOR THE CALCIUM CARBONATE GRANULES, SUBJECTING THE MIXTURE TO FROTH FLOTATION, A MAJOR AMOUNT OF THE CALCIUM CARBONATE BEING REMOVED IN THE FROTH, THE RESIDUE BEING THEREBY ENRICHED IN P2O5.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-12-09 | 1967-06-10 | 1967-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-09 | 1971-06-10 | 1971-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-09 | 1975-06-10 | 1975-12-10 | $7700.00 | Window Closed / Lapsed |