Patent US3754074A successfully refreshed from Google Patents.
US3754074A
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Removal of nitrogen oxides and other impurities from gaseous mixtures
Assignee: Boeing North American Inc
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Filing: 1970-02-20
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Granted: 1973-08-21
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Expires: 1990-02-20
Abstract
Abstract A METHOD FOR REMOVING NITROGEN OXIDES, LEAD COMPOUNDS, AND OTHER GASEOUS AND PARTICULATE IMPURITIES FROM WASTE GASES BY CONTACTING THE WASTE GASES WITH A MOLTEN ALKALI METAL CARBONATE MIXTURE. DEPENDENT UPON THE PARTICULAR IMPURITY REMOVED, SUCH AS NITROGEN OXIDES THE ABSORBENT CARBONATE MIXTURE IS REGENERATED BY TREATMENT WITH A REDUCING AGENT.
Inventors
- 👤 Le Roy Grantham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:59
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/08; F01N3/0807; F01N3/0828; F01N3/0842; B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/54; B01D53/56; B01D53/64; B01D53/68; B01D53/74; B01D53/86; B01D53/92; B01D53/922; B01D53/925; C; C01; C01B; C01B21/00; C01B21/20; C01B21/48; C01B21/50; F01N3/0814; F01N3/0871; F01N3/0885; F01N2250/00; F01N2250/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |