US680613A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ore roasting and desulfurizing furnace.
Assignee: Individual
•
Filing: 1899-02-18
•
Granted: 1901-08-13
•
Expires: 1919-02-18
Abstract
No abstract record available.
Inventors
- 👤 Amos S Partridge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:20
CPC Classifications
F; F27; F27B; F27B7/00
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) | 1904-08-12 | 1905-02-11 | 1905-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1908-08-12 | 1909-02-11 | 1909-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1912-08-12 | 1913-02-11 | 1913-08-13 | $7700.00 | Window Closed / Lapsed |