Patent US2920455A successfully refreshed from Google Patents.
US2920455A
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US
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Method for forming concrete piles
Assignee: PETER KIEWIT SONS Inc
•
Filing: 1955-11-16
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Granted: 1960-01-12
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Expires: 1975-11-16
Abstract
No abstract record available.
Inventors
- 👤 Leo W Ryser
- 👤 Ward W White
- 👤 James D Brown
- 👤 Henry A Franklin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:48
CPC Classifications
E; E02; E02D; E02D5/00; E02D5/22; E02D5/34; E02D5/36; E21; E21B; E21B10/00; E21B10/44
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE20419C
Cited
US76188A
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US293271A
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US753008A
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US633574A
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US1052738A
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AT65615B
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US1396542A
Cited
US1654600A
Cited
US1953094A
Cited
US1902098A
Cited
US2023966A
Cited
US2306118A
Cited
US2729067A
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FR1095334A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-11 | 1963-07-13 | 1964-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-11 | 1967-07-13 | 1968-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-11 | 1971-07-13 | 1972-01-12 | $7700.00 | Window Closed / Lapsed |