US3737515A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for removing deleterious pollutant constituents of the exhaust gas of a combustion engine
Assignee: INTERN ERFINDER und PATENTANST
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Filing: 1970-12-30
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Granted: 1973-06-05
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Expires: 1990-12-30
Abstract
Abstract A PROCESS FOR REMOVING POLLUTANTS FROM THE EXHAUST GAS OF AN INTERNAL COMBUSTION ENGINE COMPRISING DISPERSING THE GAS THROUGH AN AQUEOUS WASH, A PARTICULATE ABSORBENT, A SODIUM CARBONATE SOLUTION AND A DESICCANT. OPTIONALLY THE GAS MAY BE FURTHER TREATED BY CATALYTIC OXIDATION.
Inventors
- 👤 A Veloso
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:42
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/92; B01D53/922; B01D53/925; B01D53/46; B01D53/54; B01D53/56; B01D2253/00; B01D2253/10; B01D2253/112; B01D53/94; B01D53/944
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) | 1976-06-04 | 1976-12-04 | 1977-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-04 | 1980-12-04 | 1981-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-04 | 1984-12-04 | 1985-06-05 | $7700.00 | Window Closed / Lapsed |