Patent US2166093A successfully refreshed from Google Patents.
US2166093A
Expired / Lapsed
US
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Process of concentrating ores
Assignee: Armour and Co
•
Filing: 1937-04-28
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Granted: 1939-07-11
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Expires: 1957-04-28
Abstract
No abstract record available.
Inventors
- 👤 Harwood James
- 👤 William O Pool
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:31
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/01; B03D1/006; B03D2203/00; B03D2203/02; Y; Y10; Y10S; Y10S209/00; Y10S209/901; Y10S209/902
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) | 1942-07-10 | 1943-01-09 | 1943-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-07-10 | 1947-01-09 | 1947-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-07-10 | 1951-01-09 | 1951-07-11 | $7700.00 | Window Closed / Lapsed |