US2967401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for jacking tunnels
Assignee: American Marietta Co
•
Filing: 1955-03-16
•
Granted: 1961-01-10
•
Expires: 1975-03-16
Abstract
No abstract record available.
Inventors
- 👤 Edward P Washabaugh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:02
CPC Classifications
E; E21; E21D; E21D9/00; E21D9/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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DE837245C
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-01-10 | 1964-07-11 | 1965-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-10 | 1968-07-11 | 1969-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-10 | 1972-07-11 | 1973-01-10 | $7700.00 | Window Closed / Lapsed |