US3773897A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for removing nitric oxide from gaseous mixtures
Assignee: United States Steel Corp
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Filing: 1970-10-19
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Granted: 1973-11-20
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Expires: 1990-10-19
Abstract
Abstract A CONTINUOUS PROCESS FOR REMOVAL OF NITRIC OXIDE FROM COKE OVEN GAS WITH OZONE EVEN WHEN ITS MOL RATION TO NO IS AS LOW AS 2/1. THE OZONE IS INTRODUCED UNIFORMLY OVER THE CROSS SECTION OF THE COKE OVEN GAS.
Inventors
- 👤 M Fields
- 👤 W Township
- 👤 A County
- 👤 L Sumansky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:33
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/54; B01D53/56; C; C10; C10K; C10K3/00
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) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |