US3767765A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for cleansing flue gas
Assignee: SNA Europe Industries AB
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Filing: 1970-12-11
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Granted: 1973-10-23
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Expires: 1990-12-11
Abstract
Abstract A METHOD AND APPARATUS FOR CLEANSING FLUE GAS FROM A FURNACE, ACCORDING TO WHICH THE FLUE GAS IS ABSORBED IN AN ALKALINE ABSORPTION LIQUID COMPRISING WATER TO WHICH THE ALKALI IS SUPPLIED AT A CONTROLLED RATE IN RESPONSE TO THE RATE OF FUEL SUPPLY TO THE FURNACE.
Inventors
- 👤 K Gustavsson
- 👤 J Smitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:24
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/48; B01D53/50; B01D53/501; B01D53/14; B01D53/1456; B01D53/1468
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |