US3422914A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible drillstem
Assignee: ROBERT L POMEROY
•
Filing: 1966-05-05
•
Granted: 1969-01-21
•
Expires: 1986-05-05
Abstract
No abstract record available.
Inventors
- 👤 Robert L Pomeroy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:15
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/20; E21B17/203
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1660714A
Cited
US2198957A
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US2198016A
Cited
US2301783A
Cited
US2610028A
Cited
US3117596A
Cited
US3130753A
Cited
US3194274A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-21 | 1972-07-22 | 1973-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-21 | 1976-07-22 | 1977-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-21 | 1980-07-22 | 1981-01-21 | $7700.00 | Window Closed / Lapsed |