US2982366A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Retractable drill bit
Assignee: Jersey Production Research Co
•
Filing: 1956-07-30
•
Granted: 1961-05-02
•
Expires: 1976-07-30
Abstract
No abstract record available.
Inventors
- 👤 John M Camp
- 👤 Jackson M Kellner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:24
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/64; E21B10/66
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1142460A
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US1945151A
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US2287714A
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US2401960A
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US2764388A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-01 | 1964-10-31 | 1965-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-01 | 1968-10-31 | 1969-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-01 | 1972-10-31 | 1973-05-02 | $7700.00 | Window Closed / Lapsed |