US52957A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in safety-plugs to prevent barrels from bursting
Assignee: —
•
Filing: —
•
Granted: 1866-03-06
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Expires: 1883-03-06
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:39
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; F16K15/025; Y; Y10; Y10S; Y10S137/00; Y10S137/903; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7922; Y10T137/7929; Y10T137/7936
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) | 1869-03-05 | 1869-09-04 | 1870-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1873-03-05 | 1873-09-04 | 1874-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1877-03-05 | 1877-09-04 | 1878-03-06 | $7700.00 | Window Closed / Lapsed |