US2847072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods for dual completion of oil and gas wells
Assignee: Borg Warner Corp
•
Filing: 1953-06-15
•
Granted: 1958-08-12
•
Expires: 1973-06-15
Abstract
No abstract record available.
Inventors
- 👤 Maurice P Lebourg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:43
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2033562A
Cited
US2189701A
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US2189703A
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US2368428A
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US2543814A
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US2689008A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-11 | 1962-02-10 | 1962-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-11 | 1966-02-10 | 1966-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-11 | 1970-02-10 | 1970-08-12 | $7700.00 | Window Closed / Lapsed |