US3019502A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Locking device for oil well drill rods or pipes
Assignee: EDMOND L DERAMEE JR
•
Filing: 1958-07-23
•
Granted: 1962-02-06
•
Expires: 1978-07-23
Abstract
No abstract record available.
Inventors
- 👤 Jr John M Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:38
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2058689A
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US2179006A
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US2221376A
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US2303312A
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US2781658A
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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) | 1965-02-05 | 1965-08-07 | 1966-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-05 | 1969-08-07 | 1970-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-05 | 1973-08-07 | 1974-02-06 | $7700.00 | Window Closed / Lapsed |