US3733393A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of combustion products before discharge into the atmosphere
Assignee: Air Liquide SA
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Filing: 1971-09-30
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Granted: 1973-05-15
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Expires: 1991-09-30
Abstract
Abstract THE INVENTION ELATES TO A PROCESS FOR PURIFYING COMBUSTION FUMES AND OTHER RESIDUAL GASES BEFORE BEING DISCHARGED INTO THE ATMOSPHERE. THE PROCESS COMPRISES AT LEAST TWO STAGES, CONSISTING IN A FIRST DUST-EXTRACTION PHASE AND THEN A SECOND CHEMICAL PURIFICATION PHASE OF THE FUMES, IN WHICH IS ACHIEVED AN INTIMATED CONTACT OF THE SIDE SMOKES WITH A SOLUTION CONTAINING HYDROGEN PEROXIDE.
Inventors
- 👤 J Couillaud
- 👤 J Louise
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:45
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/60; Y; Y02; Y02A; Y02A50/00; Y02A50/20
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) | 1976-05-14 | 1976-11-13 | 1977-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-14 | 1980-11-13 | 1981-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-14 | 1984-11-13 | 1985-05-15 | $7700.00 | Window Closed / Lapsed |