Patent FR2163483A1 successfully refreshed from Google Patents.
US2645128A
Expired / Lapsed
US
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Apparatus for measuring water pressures in earth embankments
Assignee: Individual
•
Filing: 1951-02-09
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Granted: 1953-07-14
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Expires: 1971-02-09
Abstract
No abstract record available.
Inventors
- 👤 Harold N Walker
- 👤 John L Pulli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:45
CPC Classifications
G; G01; G01L; G01L9/00; G01L9/0033; G01B; G01B7/00; G01B7/16; G01L7/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US419924A
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US1692513A
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US2284707A
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US2360886A
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US2542905A
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US2567519A
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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) | 1956-07-13 | 1957-01-12 | 1957-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-13 | 1961-01-12 | 1961-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-13 | 1965-01-12 | 1965-07-14 | $7700.00 | Window Closed / Lapsed |