US3076248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of calcined phosphate agglomerates
Assignee: FMC Corp
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Filing: 1960-11-17
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Granted: 1963-02-05
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Expires: 1980-11-17
Abstract
No abstract record available.
Inventors
- 👤 Wendell L Darrow
- 👤 Joseph W Kass
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:35
CPC Classifications
B; B01; B01J; B01J2/00; B01J2/26; C; C01; C01B; C01B25/00; C01B25/01; Y; Y10; Y10S; Y10S425/00; Y10S425/101
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
163 words
THE METHOD OF PRODUCING A PHOSPHATE AGGLOMERATE HAVING A HIGH STRUCTURAL STRENGTH WHICH COMPRISES PLACING A CRUSHED PHOSPHATE LUMP HAVING A PARTICLE SIZE OF ABOUT 1/4 TO ABOUT 3 INCHES IN DIAMETER ON A NON-AGITATED PERFORATE CARRIER TO FORM AN UNDERHEARTH LAYER, PLACING AN OVERLAY OF AGGLOMERATE PHOSPHATE FEED ON SAID UNDERHEARTH LAYER TO FORM A FEED BED, SAID AGGLOMERATE PHOSPHATE FEED BEING FORMED BY THE AGGLOMERATION OF CRUSHED PHOSPHATE ORE CONTAINING MINOR AMOUNTS OF SHALE OIL AND CAPABLE OF PASSING THROUGH A 6 MM. SCREEN, MAINTAINING SAID UNDERHEARTH LAYER IN PROPORTIONS OF AT LEAST ABOUT 16% OF THE TOTAL FEED BED DEPTH, PASSING SAID FEED BED THROUGH A CALCINING ZONE, PASSING A HEATED GAS THROUGH SAID FEED BED IN SAID CALCINING ZONE AND HEATING SAID AGGLOMERATES TO TEMPERATURES BETWEEN ABOUT 2250 TO 2500*F., MAINTAINING SAID FEED BED IN THE CALCINING ZONE FOR FROM ABOUT 15 TO 25 MINUTES, PASSING THE RESULTING CALCINING PHOSPHATE INTO A COOLING ZONE AND RECOVERING THE CALCINED PRODUCT.
Claim 2
Independent Claim
163 words
THE METHOD OF PRODUCING A PHOSPHATE AGGLOMERATE HAVING A HIGH STRUCTURAL STRENGTH WHICH COMPRISES PLACING A CRUSHED PHOSPHATE LUMP HAVING A PARTICLE SIZE OF ABOUT 1/4 TO ABOUT 3 INCHES IN DIAMETER ON A NON-AGITATED PERFORATE CARRIER TO FORM AN UNDERHEARTH LAYER, PLACING AN OVERLAY OF AGGLOMERATE PHOSPHATE FEED ON SAID UNDERHEARTH LAYER TO FORM A FEED BED, SAID AGGLOMERATE PHOSPHATE FEED BEING FORMED BY THE AGGLOMERATION OF CRUSHED PHOSPHATE ORE CONTAINING MINOR AMOUNTS OF SHALE OIL AND CAPABLE OF PASSING THROUGH A 6 MM. SCREEN, MAINTAINING SAID UNDERHEARTH LAYER IN PROPORTIONS OF AT LEAST ABOUT 16% OF THE TOTAL FEED BED DEPTH, PASSING SAID FEED BED THROUGH A CALCINING ZONE, PASSING A HEATED GAS THROUGH SAID FEED BED IN SAID CALCINING ZONE AND HEATING SAID AGGLOMERATES TO TEMPERATURES BETWEEN ABOUT 2250 TO 2500*F., MAINTAINING SAID FEED BED IN THE CALCINING ZONE FOR FROM ABOUT 15 TO 25 MINUTES, PASSING THE RESULTING CALCINING PHOSPHATE INTO A COOLING ZONE AND RECOVERING THE CALCINED PRODUCT.
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) | 1966-02-04 | 1966-08-06 | 1967-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-04 | 1970-08-06 | 1971-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-04 | 1974-08-06 | 1975-02-05 | $7700.00 | Window Closed / Lapsed |