Patent US4396A successfully refreshed from Google Patents.
US4396A
Expired / Lapsed
US
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Piston for pumps
Assignee: —
•
Filing: —
•
Granted: 1846-03-07
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Expires: 1863-03-07
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:41
CPC Classifications
F; F04; F04B; F04B3/00; F01; F01B; F01B19/00
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) | 1849-03-06 | 1849-09-05 | 1850-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1853-03-06 | 1853-09-05 | 1854-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1857-03-06 | 1857-09-05 | 1858-03-07 | $7700.00 | Window Closed / Lapsed |