US109813A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in barrel safety-valves or vents
Assignee: —
•
Filing: —
•
Granted: 1870-12-06
•
Expires: 1887-12-06
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:44
CPC Classifications
F; F16; F16K; F16K3/00; F16K3/02; F16K3/04; F16K3/06; F16K3/08; Y; Y10; Y10T; Y10T137/00; Y10T137/7504; Y10T137/7613
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) | 1873-12-05 | 1874-06-06 | 1874-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1877-12-05 | 1878-06-06 | 1878-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1881-12-05 | 1882-06-06 | 1882-12-06 | $7700.00 | Window Closed / Lapsed |