US2267307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concentrating ores
Assignee: Armour and Co
•
Filing: 1936-12-17
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Granted: 1941-12-23
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Expires: 1956-12-17
Abstract
No abstract record available.
Inventors
- 👤 Anderson W Ralston
- 👤 William O Pool
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:48
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/01; B03D2201/00; B03D2201/02; B03D2201/04; B03D2203/00; B03D2203/02; B03D2203/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1944-12-22 | 1945-06-23 | 1945-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-12-22 | 1949-06-23 | 1949-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-12-22 | 1953-06-23 | 1953-12-23 | $7700.00 | Window Closed / Lapsed |