US1269054A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for chemically extracting pure metals from their ores at a temperature lower than the fusing-point of the metals to be extracted.
Assignee: TORONTO POWER Co Ltd
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Filing: 1917-07-05
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Granted: 1918-06-11
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Expires: 1937-07-05
Abstract
No abstract record available.
Inventors
- 👤 Farley Granger Clark
- 👤 Alexander Thomas Stuart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:36
CPC Classifications
C; C21; C21B; C21B13/00; C21B13/0073
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) | 1921-06-10 | 1921-12-10 | 1922-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1925-06-10 | 1925-12-10 | 1926-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1929-06-10 | 1929-12-10 | 1930-06-11 | $7700.00 | Window Closed / Lapsed |