US39636A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in signal-rockets
Assignee: —
•
Filing: —
•
Granted: 1863-08-25
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Expires: 1880-08-25
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:44
CPC Classifications
F; F42; F42B; F42B4/00; F42B4/26
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) | 1866-08-24 | 1867-02-23 | 1867-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1870-08-24 | 1871-02-23 | 1871-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1874-08-24 | 1875-02-23 | 1875-08-25 | $7700.00 | Window Closed / Lapsed |