US2491919A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the recovery of nitrogen oxides and hydrocarbons from gaseous mixtures
Assignee: Commercial Solvents Corp
•
Filing: 1944-06-10
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Granted: 1949-12-20
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Expires: 1964-06-10
Abstract
No abstract record available.
Inventors
- 👤 Richard S Egly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:06
CPC Classifications
C; C01; C01B; C01B21/00; C01B21/20; C01B21/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2309845A
Cited
US2346441A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-19 | 1953-06-20 | 1953-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-19 | 1957-06-20 | 1957-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-19 | 1961-06-20 | 1961-12-20 | $7700.00 | Window Closed / Lapsed |