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Patent US2615519A successfully refreshed from Google Patents.
US2615519A
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Plug handling head for well casings
Assignee: Individual
•
Filing: 1947-06-30
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Granted: 1952-10-28
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Expires: 1967-06-30
Abstract
No abstract record available.
Inventors
- 👤 Charles J Carr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:38
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/03; E21B33/04; E21B33/05
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US54867A
Cited
US1662311A
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US1735330A
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US1743626A
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US1791874A
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US1750143A
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US2196652A
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US2246802A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-10-28 | 1956-04-28 | 1956-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-28 | 1960-04-28 | 1960-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-28 | 1964-04-28 | 1964-10-28 | $7700.00 | Window Closed / Lapsed |