Patent US2934148A successfully refreshed from Google Patents.
US2934148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple zone well completion
Assignee: Cooper Industries LLC
•
Filing: 1957-04-12
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Granted: 1960-04-26
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Expires: 1977-04-12
Abstract
No abstract record available.
Inventors
- 👤 Frank B Allaire
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:05
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/03; E21B33/04; E21B33/047
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1586923A
Cited
US2044590A
Cited
US1999699A
Cited
US2194255A
Cited
US2335355A
Cited
US2794505A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-26 | 1963-10-26 | 1964-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-26 | 1967-10-26 | 1968-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-26 | 1971-10-26 | 1972-04-26 | $7700.00 | Window Closed / Lapsed |