US3153339A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for sensing well pipe movement
Assignee: Individual
•
Filing: 1961-04-17
•
Granted: 1964-10-20
•
Expires: 1981-04-17
Abstract
No abstract record available.
Inventors
- 👤 Ford I Alexander
- 👤 Ira C Bechtold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:59
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/09
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2716890A
Cited
US2698920A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-10-20 | 1968-04-20 | 1968-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-20 | 1972-04-20 | 1972-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-20 | 1976-04-20 | 1976-10-20 | $7700.00 | Window Closed / Lapsed |