US2458902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of ammonia from ore tailings pulp
Assignee: Nicaro Nickel Co
•
Filing: 1943-10-07
•
Granted: 1949-01-11
•
Expires: 1963-10-07
Abstract
No abstract record available.
Inventors
- 👤 Robert R Fitzhugh
- 👤 Benjamin F Frederick
- 👤 Bernard A Axelrad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:05
CPC Classifications
C; C22; C22B; C22B23/00; C22B23/04; C22B23/0453; C01; C01C; C01C1/00; C01C1/02; C01C1/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2400114A
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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) | 1952-01-11 | 1952-07-12 | 1953-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-01-11 | 1956-07-12 | 1957-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-01-11 | 1960-07-12 | 1961-01-11 | $7700.00 | Window Closed / Lapsed |