US2467274A
Expired / Lapsed
US
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Process and apparatus for recovering in the form of alkali metal salts the oxides of nitrogen from gases containing the same
Assignee: Blaw Knox Co
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Filing: 1945-05-23
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Granted: 1949-04-12
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Expires: 1965-05-23
Abstract
No abstract record available.
Inventors
- 👤 James R Shields
- 👤 Herbert L Barnebey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:28
CPC Classifications
C; C01; C01B; C01B21/00; C01B21/20; C01B21/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-04-11 | 1952-10-11 | 1953-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-04-11 | 1956-10-11 | 1957-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-04-11 | 1960-10-11 | 1961-04-12 | $7700.00 | Window Closed / Lapsed |