Patent US2509144A successfully refreshed from Google Patents.
US2509144A
Expired / Lapsed
US
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Well plugging and whipstocking
Assignee: Individual
•
Filing: 1945-08-10
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Granted: 1950-05-23
•
Expires: 1965-08-10
Abstract
No abstract record available.
Inventors
- 👤 Donovan B Grable
- 👤 John M Jackson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:10
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/13; E21B33/134; E21B7/00; E21B7/04; E21B7/06; E21B7/061
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1188001A
Cited
US1835227A
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US1821426A
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US1923448A
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US1951638A
Cited
US2179832A
Cited
US2222014A
Cited
US2281414A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-22 | 1953-11-21 | 1954-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-22 | 1957-11-21 | 1958-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-22 | 1961-11-21 | 1962-05-23 | $7700.00 | Window Closed / Lapsed |