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US2991835A
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Hanger or stop for well tools and means for inserting the same
Assignee: Otis Engineering Corp
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Filing: 1957-06-27
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Granted: 1961-07-11
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Expires: 1977-06-27
Abstract
No abstract record available.
Inventors
- 👤 Carl M Schwab
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:54
CPC Classifications
E; E21; E21B; E21B23/00; E21B23/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2153812A
Cited
US2401119A
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US2644527A
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US2726724A
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US2790395A
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US2800186A
Cited
US2828698A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-10 | 1965-01-09 | 1965-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-10 | 1969-01-09 | 1969-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-10 | 1973-01-09 | 1973-07-11 | $7700.00 | Window Closed / Lapsed |