US2744944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotating electric phosphorus furnace
Assignee: Tennessee Valley Authority
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Filing: 1954-12-17
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Granted: 1956-05-08
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Expires: 1974-12-17
Abstract
No abstract record available.
Inventors
- 👤 Jr Marcus M Striplin
- 👤 Stanford A Hardin
- 👤 William H Bundy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:33
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/003; C01B25/01; C21; C21C; C21C5/00; C21C5/52; H; H05; H05B; H05B7/00; H05B7/02; H05B7/11; H05B7/18; H05B7/20; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
AN ELECTRIC FURNACE FOR SMELTING PHOSPHATE ROCK WHICH COMPRISES IN COMBINATION A VERTICAL, ROUND, ROTATABLY MOUNTED CRUCIBLE HAVING A CARBON HEARTH; MEANS FOR ROTATING THE CRUCIBLE AT SLOW, CONTROLLED SPEED, A STATIONARY COVER SUPERIMPOSED ON THE CRUCIBLE; A GASTIGHT SEAL BETWEEN THE CRUCIBLE AND THE COVER; THREE VERTICAL GRAPHITE ELECTRODES DISPOSED AT THE APICES OF AN EQUILATERAL TRIANGLE, EACH OF THE ELECTRODES HAVING A DIAMETER WHICH MAY BE CALCULATED
Claim 2
Dependent Claim
69 words
AN ELECTRIC FURNACE FOR SMELTING PHOSPHATE ROCK WHICH COMPRISES IN COMBINATION A VERTICAL, ROUND, ROTATABLY MOUNTED CRUCIBLE HAVING A CARBON HEARTH; MEANS FOR ROTATING THE CRUCIBLE AT SLOW, CONTROLLED SPEED, A STATIONARY COVER SUPERIMPOSED ON THE CRUCIBLE; A GASTIGHT SEAL BETWEEN THE CRUCIBLE AND THE COVER; THREE VERTICAL GRAPHITE ELECTRODES DISPOSED AT THE APICES OF AN EQUILATERAL TRIANGLE, EACH OF THE ELECTRODES HAVING A DIAMETER WHICH MAY BE CALCULATED
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) | 1959-05-08 | 1959-11-07 | 1960-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-08 | 1963-11-07 | 1964-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-08 | 1967-11-07 | 1968-05-08 | $7700.00 | Window Closed / Lapsed |