US2653666A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dump bailer and bridge plug
Assignee: Baker Hughes Oilfield Operations LLC
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Filing: 1949-03-21
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Granted: 1953-09-29
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Expires: 1969-03-21
Abstract
No abstract record available.
Inventors
- 👤 Reuben C Baker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:23
CPC Classifications
E; E21; E21B; E21B23/00; E21B23/06; E21B23/065; E21B27/00; E21B27/02; E21B33/00; E21B33/10; E21B33/12; E21B33/129; E21B33/1293; E21B33/13; E21B33/134
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-28 | 1957-03-30 | 1957-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-28 | 1961-03-30 | 1961-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-28 | 1965-03-30 | 1965-09-29 | $7700.00 | Window Closed / Lapsed |