US39568A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in valves for pumps
Assignee: —
•
Filing: —
•
Granted: 1863-08-18
•
Expires: 1880-08-18
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:04
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; F16K15/021; F16K47/00; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7838
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) | 1866-08-17 | 1867-02-16 | 1867-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1870-08-17 | 1871-02-16 | 1871-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1874-08-17 | 1875-02-16 | 1875-08-18 | $7700.00 | Window Closed / Lapsed |