US3020965A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic pile extractor
Assignee: Individual
•
Filing: 1959-08-19
•
Granted: 1962-02-13
•
Expires: 1979-08-19
Abstract
No abstract record available.
Inventors
- 👤 Jr Richard F Keller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:26
CPC Classifications
E; E02; E02D; E02D9/00; E02D9/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1409760A
Cited
US1644560A
Cited
US1853379A
Cited
DE510367C
Cited
US2354936A
Cited
FR1174639A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-12 | 1965-08-14 | 1966-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-12 | 1969-08-14 | 1970-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-12 | 1973-08-14 | 1974-02-13 | $7700.00 | Window Closed / Lapsed |