US172550A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in pipe-tongs
Assignee: —
•
Filing: —
•
Granted: 1876-01-25
•
Expires: 1893-01-25
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:16
CPC Classifications
B; B25; B25B; B25B7/00; B25B7/06; B25B7/10
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) | 1879-01-24 | 1879-07-26 | 1880-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1883-01-24 | 1883-07-26 | 1884-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1887-01-24 | 1887-07-26 | 1888-01-25 | $7700.00 | Window Closed / Lapsed |