Patent US2974016A successfully refreshed from Google Patents.
US2974016A
Expired / Lapsed
US
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Process for the production of phosphorus
Assignee: Virginia Carolina Chemical Corp
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Filing: 1957-06-27
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Granted: 1961-03-07
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Expires: 1977-06-27
Abstract
No abstract record available.
Inventors
- 👤 Horton John Perrine
- 👤 Whitehurst Brooks Morris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 07:51
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/003; C01B25/01; C01B25/02; C01G; C01G23/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
PROCESS FOR THE PRODUCTION OF PHOSPHORUS WHICH COMPRISES CONTACTING A GAS CONSISTING ESSENTIALLY OF CARBON MONOXIDE AND PHOSPHORUS, PREHEATED TO A TEMPERATURE ABOVE 2400$F., WITH A FLUIDIZED BED CONSISTING OF A FLUENT MIXTURE OF FINELY DIVIDED PHOSPHATIC MATERIAL AND FINELY DIVIDED CARBONACEOUS MATERIAL AND RECOVERING PHOSPHORUS FROM THE RESULTING GASES, THE PREHEATED GAS BEING THE SOLE SUPPLY OF HEAT TO SAID BED.
Claim 2
Dependent Claim
62 words
PROCESS FOR THE PRODUCTION OF PHOSPHORUS WHICH COMPRISES CONTACTING A GAS CONSISTING ESSENTIALLY OF CARBON MONOXIDE AND PHOSPHORUS, PREHEATED TO A TEMPERATURE ABOVE 2400$F., WITH A FLUIDIZED BED CONSISTING OF A FLUENT MIXTURE OF FINELY DIVIDED PHOSPHATIC MATERIAL AND FINELY DIVIDED CARBONACEOUS MATERIAL AND RECOVERING PHOSPHORUS FROM THE RESULTING GASES, THE PREHEATED GAS BEING THE SOLE SUPPLY OF HEAT TO SAID BED.
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) | 1964-03-06 | 1964-09-05 | 1965-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-06 | 1968-09-05 | 1969-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-06 | 1972-09-05 | 1973-03-07 | $7700.00 | Window Closed / Lapsed |