US3687630A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas cleaning process
Assignee: Individual
•
Filing: 1968-07-24
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Granted: 1972-08-29
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Expires: 1988-07-24
Abstract
Abstract SULFUR OXIDES AND FLY ASH ARE REMOVED FROM COMBUSTION GASES EMPLOYING A TWO STAGE SCRUBBER-ABSORPTION SYSTEM. IN THE FIRST STAGE INWARDLY SWIRLING CONTAMINATED GAS IS PASSED THROUGH A DOWNWARDLY FLOWING FILM OF WASHING LIQUID ON EACH SIDE OF A CYLINDRICAL PERFORATE BAFFLE. IN THE SECOND STAGE THE SWIRLING GAS IS PASSED INWARDLY THROUGH TWO FILMS OF ABSORBENT LIQUID FLOWING DOWNWARDLY ON THE OUTSIDE OF A CYLINDRICAL PERFORATE BAFFLE AND ON THE INSIDE OF A CONCENTRIC PERFORATE BAFFLE WITHIN THE FIRST BAFFLE. ELEMENTAL SULFUR OR SULFUR COMPOUNDS MAY BE RECOVERED IN THE PROCESS.
Inventors
- 👤 John P Tailor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:09
CPC Classifications
B; B01; B01D; B01D45/00; B01D45/12; B01D47/00; B01D47/02; B01D47/028; B01D53/00; B01D53/34; B01D53/46; B01D53/48; B01D53/50; B01D53/501
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 |