US2461010A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the recovery of ammonia
Assignee: Sinclair Refining Co
•
Filing: 1942-12-29
•
Granted: 1949-02-08
•
Expires: 1962-12-29
Abstract
No abstract record available.
Inventors
- 👤 John W Teter
- 👤 Robert H Stookey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:53
CPC Classifications
C; C07; C07C; C07C209/00; C07C209/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2156234A
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US1518421A
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US1690585A
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DE479079C
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US1745730A
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US1973474A
Cited
GB319205A
Cited
GB422139A
Cited
US2245028A
Cited
US2370063A
Cited
US2306553A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-02-08 | 1952-08-09 | 1953-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-02-08 | 1956-08-09 | 1957-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-02-08 | 1960-08-09 | 1961-02-08 | $7700.00 | Window Closed / Lapsed |