US2686689A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for retrieving junk from well bores
Assignee: Individual
•
Filing: 1950-04-29
•
Granted: 1954-08-17
•
Expires: 1970-04-29
Abstract
No abstract record available.
Inventors
- 👤 Pyke Herbert Douglas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:22
CPC Classifications
E; E21; E21B; E21B31/00; E21B31/007
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US398396A
Cited
US598725A
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US1410904A
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US2124772A
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US2148019A
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US2159249A
Cited
US2345727A
Cited
US2561692A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-16 | 1958-02-15 | 1958-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-16 | 1962-02-15 | 1962-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-16 | 1966-02-15 | 1966-08-17 | $7700.00 | Window Closed / Lapsed |