Patent US1060271A successfully refreshed from Google Patents.
US1060271A
Expired / Lapsed
US
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Method of building subaqueous tunnels.
Assignee: Individual
•
Filing: 1912-11-20
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Granted: 1913-04-29
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Expires: 1932-11-20
Abstract
No abstract record available.
Inventors
- 👤 Duncan D Mcbean
- 👤 Henry M Chance
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:08
CPC Classifications
E; E02; E02D; E02D29/00; E02D29/063; E02D29/067
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) | 1916-04-28 | 1916-10-28 | 1917-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1920-04-28 | 1920-10-28 | 1921-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1924-04-28 | 1924-10-28 | 1925-04-29 | $7700.00 | Window Closed / Lapsed |