US2827770A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pre-stressed pile with recoverable reinforcement
Assignee: Individual
•
Filing: 1951-07-06
•
Granted: 1958-03-25
•
Expires: 1971-07-06
Abstract
No abstract record available.
Inventors
- 👤 Bakker Johannes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:41
CPC Classifications
E; E02; E02D; E02D5/00; E02D5/22; E02D5/58
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1949618A
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US734349A
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US761287A
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US1301958A
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US1342319A
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DE642951C
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US2374690A
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CH273004A
Cited
FR903317A
Cited
GB559314A
Cited
FR900581A
Cited
FR931723A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-24 | 1961-09-23 | 1962-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-24 | 1965-09-23 | 1966-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-24 | 1969-09-23 | 1970-03-25 | $7700.00 | Window Closed / Lapsed |