US2970651A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulically inflatable anchors
Assignee: Jersey Production Research Co
•
Filing: 1957-08-21
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Granted: 1961-02-07
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Expires: 1977-08-21
Abstract
No abstract record available.
Inventors
- 👤 Alan P Roberts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:12
CPC Classifications
E; E02; E02D; E02D5/00; E02D5/74; E02D5/80; E02D5/805; E21; E21B; E21B23/00; E21B23/06; E21B33/00; E21B33/10; E21B33/12; E21B33/127; E21B33/1277
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-02-07 | 1964-08-08 | 1965-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-07 | 1968-08-08 | 1969-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-07 | 1972-08-08 | 1973-02-07 | $7700.00 | Window Closed / Lapsed |