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US1484188A
Expired / Lapsed
US
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Method of and means for erecting tunnels
Assignee: Individual
•
Filing: 1919-11-11
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Granted: 1924-02-19
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Expires: 1939-11-11
Abstract
No abstract record available.
Inventors
- 👤 John F O'rourke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:35
CPC Classifications
E; E21; E21D; E21D11/00; E21D11/40
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) | 1927-02-18 | 1927-08-20 | 1928-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1931-02-18 | 1931-08-20 | 1932-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1935-02-18 | 1935-08-20 | 1936-02-19 | $7700.00 | Window Closed / Lapsed |