Patent US805834A successfully refreshed from Google Patents.
US805834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnace for refining copper.
Assignee: Individual
•
Filing: 1903-04-08
•
Granted: 1905-11-28
•
Expires: 1923-04-08
Abstract
No abstract record available.
Inventors
- 👤 Ralph Baggaley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:52
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/28; C21C5/42
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1908-11-27 | 1909-05-29 | 1909-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1912-11-27 | 1913-05-29 | 1913-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1916-11-27 | 1917-05-29 | 1917-11-28 | $7700.00 | Window Closed / Lapsed |