US40967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in tools for fastening boiler-tubes
Assignee: —
•
Filing: —
•
Granted: 1863-12-15
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Expires: 1880-12-15
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:25
CPC Classifications
B; B21; B21D; B21D19/00; B21D19/02; B21D19/04; B21D19/046
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) | 1866-12-14 | 1867-06-15 | 1867-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1870-12-14 | 1871-06-15 | 1871-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1874-12-14 | 1875-06-15 | 1875-12-15 | $7700.00 | Window Closed / Lapsed |