US1284910A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for recovering metals from ores.
Assignee: Bunker Hill & Sullivan Mining & Concentrating Co
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Filing: 1917-04-30
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Granted: 1918-11-12
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Expires: 1937-04-30
Abstract
No abstract record available.
Inventors
- 👤 Clarence L Larson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:22
CPC Classifications
C; C22; C22B; C22B13/00; C22B13/04
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) | 1921-11-11 | 1922-05-13 | 1922-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1925-11-11 | 1926-05-13 | 1926-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1929-11-11 | 1930-05-13 | 1930-11-12 | $7700.00 | Window Closed / Lapsed |