Patent US2644532A successfully refreshed from Google Patents.
US2644532A
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US
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Apparatus and method for conditioning oil and gas wells
Assignee: Baker Hughes Oilfield Operations LLC
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Filing: 1947-12-09
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Granted: 1953-07-07
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Expires: 1967-12-09
Abstract
No abstract record available.
Inventors
- 👤 Bernardus E Mater
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:31
CPC Classifications
E; E21; E21B; E21B41/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1852716A
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US2211845A
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US2157964A
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US2111793A
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US2189701A
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US2277380A
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US2328840A
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US2368400A
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US2442544A
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US2359710A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-06 | 1957-01-05 | 1957-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-06 | 1961-01-05 | 1961-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-06 | 1965-01-05 | 1965-07-07 | $7700.00 | Window Closed / Lapsed |