Patent US1544726A successfully refreshed from Google Patents.
US1544726A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic refining of metals
Assignee: US SMELTING REFINING AND MINING CO
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Filing: 1924-08-28
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Granted: 1925-07-07
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Expires: 1944-08-28
Abstract
No abstract record available.
Inventors
- 👤 Frank F Colcord
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:45
CPC Classifications
C; C25; C25C; C25C1/00
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) | 1928-07-06 | 1929-01-05 | 1929-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1932-07-06 | 1933-01-05 | 1933-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1936-07-06 | 1937-01-05 | 1937-07-07 | $7700.00 | Window Closed / Lapsed |