US2954826A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heated well production string
Assignee: Individual
•
Filing: 1957-12-02
•
Granted: 1960-10-04
•
Expires: 1977-12-02
Abstract
No abstract record available.
Inventors
- 👤 William E Sievers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 01:47
CPC Classifications
E; E21; E21B; E21B36/00; E21B36/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US495936A
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US2211380A
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US2268978A
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US2525314A
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US2500305A
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US2530280A
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US2543297A
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US2632836A
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US2859368A
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US2748868A
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US2754912A
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US2844699A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-04 | 1964-04-04 | 1964-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-04 | 1968-04-04 | 1968-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-04 | 1972-04-04 | 1972-10-04 | $7700.00 | Window Closed / Lapsed |