US2647584A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well packer and bridge plug for well bores
Assignee: Baker Hughes Oilfield Operations LLC
•
Filing: 1949-03-11
•
Granted: 1953-08-04
•
Expires: 1969-03-11
Abstract
No abstract record available.
Inventors
- 👤 John R Baker
- 👤 Martin B Conrad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:50
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/12; E21B33/129; E21B33/1293
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US654875A
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US2021223A
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US2153035A
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US2204648A
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US2241532A
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US2467801A
Cited
US2589506A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-03 | 1957-02-02 | 1957-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-03 | 1961-02-02 | 1961-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-03 | 1965-02-02 | 1965-08-04 | $7700.00 | Window Closed / Lapsed |