US3379257A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anchoring devices for well tools
Assignee: Otis Engineering Corp
•
Filing: 1965-10-14
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Granted: 1968-04-23
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Expires: 1985-10-14
Abstract
No abstract record available.
Inventors
- 👤 Jack W Tamplen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:31
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/12; E21B33/129
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2384192A
Cited
US2814348A
Cited
US2901046A
Cited
US2942665A
Cited
US2944604A
Cited
US2884073A
Cited
US3057407A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-23 | 1971-10-23 | 1972-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-23 | 1975-10-23 | 1976-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-23 | 1979-10-23 | 1980-04-23 | $7700.00 | Window Closed / Lapsed |