US2984545A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manganese oxide process for the recovery of sulfur dioxide from waste gases
Assignee: Tennessee Valley Authority
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Filing: 1958-02-27
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Granted: 1961-05-16
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Expires: 1978-02-27
Abstract
No abstract record available.
Inventors
- 👤 Tarbutton Grady
- 👤 Thomas M Jones
- 👤 John C Driskell
- 👤 Carter M Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:39
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/48; B01D53/50; B01D53/507; A; A61; A61K; A61K9/00; A61K9/20; C; C01; C01B; C01B17/00; C01B17/48; C01B17/50; C01B17/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
IN THE PROCESS OF RECOVERING SULFUR DIOXIDE FROM WASTE GASES IN WHICH THE WASTE GASES CONTAINING SULFUR DIOXIDE ARE PASSED IN A SCRUBBING STEP UPWARDLY THROUGH A SCRUBBING TOWER IN INTIMATE CONTACT WITH A DESCENDING AQUEOUS SLURRY OF MANGANESE OXIDES, WHICH AQUEOUS SLURRY IS WITHDRAWN FROM THE LOWER PART OF THE TOWER TO A PRECIPITATION STEP FROM WHICH PRECIPITATED MANGANESE SULFATE IS SENT TO A CALCINING STEP WHEREIN THE SULFUR DIOXIDE PRODUCT IS SEPARATED AND THE REGENERATED MANGANESE OXIDES ARE RECOVERED FOR RECYCLING TO AN AQUEOUS SLURRYPREPARATION STEP, THE IMPROVEMENT IN COMBINATION THEREWITH WHICH COMPRISES CONTROLLING THE PROPORTION OF LOWER MANGANESE OXIDES FORMED FROM THE CALCINATION STEP BY
Claim 2
Dependent Claim
108 words
IN THE PROCESS OF RECOVERING SULFUR DIOXIDE FROM WASTE GASES IN WHICH THE WASTE GASES CONTAINING SULFUR DIOXIDE ARE PASSED IN A SCRUBBING STEP UPWARDLY THROUGH A SCRUBBING TOWER IN INTIMATE CONTACT WITH A DESCENDING AQUEOUS SLURRY OF MANGANESE OXIDES, WHICH AQUEOUS SLURRY IS WITHDRAWN FROM THE LOWER PART OF THE TOWER TO A PRECIPITATION STEP FROM WHICH PRECIPITATED MANGANESE SULFATE IS SENT TO A CALCINING STEP WHEREIN THE SULFUR DIOXIDE PRODUCT IS SEPARATED AND THE REGENERATED MANGANESE OXIDES ARE RECOVERED FOR RECYCLING TO AN AQUEOUS SLURRYPREPARATION STEP, THE IMPROVEMENT IN COMBINATION THEREWITH WHICH COMPRISES CONTROLLING THE PROPORTION OF LOWER MANGANESE OXIDES FORMED FROM THE CALCINATION STEP BY
References Cited (Backward Citations)
US2691570A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-15 | 1964-11-14 | 1965-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-15 | 1968-11-14 | 1969-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-15 | 1972-11-14 | 1973-05-16 | $7700.00 | Window Closed / Lapsed |