US2589272A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of calcium metaphosphate
Assignee: Tennessee Valley Authority
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Filing: 1949-03-16
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Granted: 1952-03-18
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Expires: 1969-03-16
Abstract
No abstract record available.
Inventors
- 👤 Miller Philip
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:51
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/16; C01B25/26; C01B25/38; C01B25/44; C05; C05B; C05B13/00; C05B13/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
A PROCESS FOR THE PRODUCTION OF CALCIUM METAPHOSPHATE WHICH COMPRISES CONTINUOUSLY INTRODUCING A STREAM OF FLUID PHOSPHORUS INTO A COMBUSTION ZONE IN INTIMATE CONTACT WITH A CONTINUOUS STREAM OF AIR; CONCOMITANTLY INTRODUCING A CONTINUOUS STREAM OF FINELY DIVIDED PHOSPHATE ROCK INTO THE COMBUSTION ZONE; INTIMATELY CONTACTING THE FINELY DIVIDED PHOSPHATE ROCK, IN SUSPENSION IN THE COMBUSTION ZONE, WITH GASEOUS PRODUCTS OF COMBUSTION RESULTING FROM BURNING THE STREAM OF PHOSPHORUS; WITHDRAWING A GASEOUS EFFLUENT FROM THE COMBUSTION ZONE; PASSING THE WITHDRAWN GASEOUS EFFLUENT THROUGH A BED OF PHOSPHATE ROCK IN LUMPS OF SUBSTANTIAL SIZE IN A SECONDARY REACTION ZONE; CONTROLLING THE RATE OF INTRODUCTION OF THE STREAM OF MOLTEN PHOSPHORUS TO MAINTAIN A TEMPERATURE IN THE COMBUSTION ZONE AND IN THE SECONDARY REACTION ZONE SUBSTANTIALLY ABOVE THE MELTING POINT OF CALCIUM META-
Claim 2
Dependent Claim
131 words
A PROCESS FOR THE PRODUCTION OF CALCIUM METAPHOSPHATE WHICH COMPRISES CONTINUOUSLY INTRODUCING A STREAM OF FLUID PHOSPHORUS INTO A COMBUSTION ZONE IN INTIMATE CONTACT WITH A CONTINUOUS STREAM OF AIR; CONCOMITANTLY INTRODUCING A CONTINUOUS STREAM OF FINELY DIVIDED PHOSPHATE ROCK INTO THE COMBUSTION ZONE; INTIMATELY CONTACTING THE FINELY DIVIDED PHOSPHATE ROCK, IN SUSPENSION IN THE COMBUSTION ZONE, WITH GASEOUS PRODUCTS OF COMBUSTION RESULTING FROM BURNING THE STREAM OF PHOSPHORUS; WITHDRAWING A GASEOUS EFFLUENT FROM THE COMBUSTION ZONE; PASSING THE WITHDRAWN GASEOUS EFFLUENT THROUGH A BED OF PHOSPHATE ROCK IN LUMPS OF SUBSTANTIAL SIZE IN A SECONDARY REACTION ZONE; CONTROLLING THE RATE OF INTRODUCTION OF THE STREAM OF MOLTEN PHOSPHORUS TO MAINTAIN A TEMPERATURE IN THE COMBUSTION ZONE AND IN THE SECONDARY REACTION ZONE SUBSTANTIALLY ABOVE THE MELTING POINT OF CALCIUM META-
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) | 1955-03-18 | 1955-09-17 | 1956-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-18 | 1959-09-17 | 1960-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-18 | 1963-09-17 | 1964-03-18 | $7700.00 | Window Closed / Lapsed |