US1053486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of treating ores preparatory to magnetic separation.
Assignee: CAMPBELL MAGNETIC SEPARATING Co
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Filing: 1912-04-06
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Granted: 1913-02-18
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Expires: 1932-04-06
Abstract
No abstract record available.
Inventors
- 👤 James B Etherington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:58
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/02
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) | 1916-02-18 | 1916-08-19 | 1917-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1920-02-18 | 1920-08-19 | 1921-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1924-02-18 | 1924-08-19 | 1925-02-18 | $7700.00 | Window Closed / Lapsed |