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US3036646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Retractable turbine drill
Assignee: Jersey Production Research Co
•
Filing: 1957-10-11
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Granted: 1962-05-29
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Expires: 1977-10-11
Abstract
No abstract record available.
Inventors
- 👤 John E Eckel
- 👤 John M Camp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:02
CPC Classifications
E; E21; E21B; E21B4/00; E21B4/02; E21B10/00; E21B10/64; E21B10/66
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1777961A
Cited
US1896106A
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US1948631A
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US1948632A
Cited
US2250912A
Cited
US2330083A
Cited
US2764388A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-05-28 | 1965-11-27 | 1966-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-28 | 1969-11-27 | 1970-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-28 | 1973-11-27 | 1974-05-29 | $7700.00 | Window Closed / Lapsed |