US3687614A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conversion to formate in one stage of thiosulfate formed in removal of sulfur dioxide from gases with formate
Assignee: Consolidation Coal Co
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Filing: 1971-03-29
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Granted: 1972-08-29
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Expires: 1991-03-29
Abstract
Abstract SODIUM, POTASSIUM, OR AMMONIUM THIOSULFATE IS CONVERTED IN ONE STAGE TO THE CORRESPONDING FORMATE AND H2S BY HEATING THE THIOSULFATE TO AN ELEVATED TEMPERATURE ABOVE 475*F. IN THE PRESENCE OF CARBON MONOXIDE, STEAM,AND ONE OF THE FOLLOWING: SODIUM, POTASSIUM, AND AMMONIUM FORMATES.
Inventors
- 👤 Paul M Yavorsky
- 👤 Everett Gorin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:00
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/48; B01D53/50; B01D53/507
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |