US3607019A
Expired / Lapsed
US
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Process for producing a sodium polyphosphate from an aqueous orthophosphate solution
Assignee: FMC Corp
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Filing: 1969-03-10
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Granted: 1971-09-21
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Expires: 1989-03-10
Abstract
Abstract A spray-drying process for producing a sodium polyphosphate from an aqueous sodium orthophosphate solution by spraying the orthophosphate feed solution through a plurality of atomizing spray nozzles downward through a zone containing a truncated cone-shaped flame in such manner that a minimum of the atomized orthophosphate solution passes directly through the cone flame, drying the orthophosphate feed solution to a dried orthophosphate and by continued drying, converting the dry orthophosphate to a sodium polyphosphate and separating the polyphosphate from the drying gas.
Inventors
- 👤 John F Herink
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:59
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/16; C01B25/26; C01B25/38; C01B25/40; C01B25/41; C01B25/412; C01B25/414
Claims Analysis
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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) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |