Patent US3784478A successfully refreshed from Google Patents.
US3784478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control of nitrogen oxides from combustion process effluents
Assignee: Argo Research International Ltd
•
Filing: 1971-09-07
•
Granted: 1974-01-08
•
Expires: 1991-09-07
Abstract
Abstract A PROCESS FOR THE REMOVAL OF NITROGEN CONAINING COMPOUNDS FROM A GAS CONTAINING A MIXTURE OF THE SAME COMPRISING CONTACTING THE GAS WITH A COMPOSITION COMPRISING AN ELECTRON DONOR COMPOUND, WATER, AND AN ALKALI COMPOUND.
Inventors
- 👤 N Kolak
- 👤 E Altwicker
- 👤 R Gibbs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:29
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/54; B01D53/56; Y; Y02; Y02C; Y02C20/00; Y02C20/10
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |