US110313A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in boiler-furnaces
Assignee: —
•
Filing: —
•
Granted: 1870-12-20
•
Expires: 1887-12-20
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:56
CPC Classifications
F; F23; F23K; F23K3/00; F23K3/10; F23K3/12
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) | 1873-12-19 | 1874-06-20 | 1874-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1877-12-19 | 1878-06-20 | 1878-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1881-12-19 | 1882-06-20 | 1882-12-20 | $7700.00 | Window Closed / Lapsed |