US2939533A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Casingless, multiple-tubing well completing and producing system
Assignee: Kobe Inc
•
Filing: 1955-06-20
•
Granted: 1960-06-07
•
Expires: 1975-06-20
Abstract
No abstract record available.
Inventors
- 👤 Clarence J Coberly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:28
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/13; E21B43/00; E21B43/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1067868A
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US1511067A
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US2335355A
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US2335387A
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US2366547A
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US2351322A
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US2357145A
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US2652000A
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US2605637A
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US2767792A
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US2785753A
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US2780291A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-07 | 1963-12-07 | 1964-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-07 | 1967-12-07 | 1968-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-07 | 1971-12-07 | 1972-06-07 | $7700.00 | Window Closed / Lapsed |