US875664A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tunneling-machine.
Assignee: J P KARNS TUNNELING MACHINE CO
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Filing: 1906-04-30
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Granted: 1907-12-31
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Expires: 1926-04-30
Abstract
No abstract record available.
Inventors
- 👤 John P Karns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:59
CPC Classifications
E; E21; E21D; E21D9/00; E21D9/10; E21D9/106
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) | 1910-12-30 | 1911-07-01 | 1911-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1914-12-30 | 1915-07-01 | 1915-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1918-12-30 | 1919-07-01 | 1919-12-31 | $7700.00 | Window Closed / Lapsed |