Patent US2951682A successfully refreshed from Google Patents.
US2951682A
Expired / Lapsed
US
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Gas drilling apparatus
Assignee: Jersey Production Research Co
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Filing: 1956-08-24
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Granted: 1960-09-06
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Expires: 1976-08-24
Abstract
No abstract record available.
Inventors
- 👤 Frank G Boucher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:04
CPC Classifications
E; E21; E21B; E21B21/00; E21B21/16; E21B6/00
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) | 1963-09-06 | 1964-03-07 | 1964-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-06 | 1968-03-07 | 1968-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-06 | 1972-03-07 | 1972-09-06 | $7700.00 | Window Closed / Lapsed |