Patent US2534271A successfully refreshed from Google Patents.
US3725A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Richard sealy
Assignee: —
•
Filing: —
•
Granted: 1844-08-31
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Expires: 1861-08-31
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:46
CPC Classifications
B; B67; B67D; B67D1/00; B67D1/04; B67D1/0412
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) | 1847-08-31 | 1848-03-01 | 1848-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1851-08-31 | 1852-03-01 | 1852-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1855-08-31 | 1856-03-01 | 1856-08-31 | $7700.00 | Window Closed / Lapsed |