US2885006A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well flow control and anchoring device
Assignee: Pressure Services Inc
•
Filing: 1952-11-03
•
Granted: 1959-05-05
•
Expires: 1972-11-03
Abstract
No abstract record available.
Inventors
- 👤 William L Long
- 👤 Temple P Hoffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:48
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2246811A
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US2230107A
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US2272388A
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US2392244A
Cited
US2506680A
Cited
US2428139A
Cited
US2604169A
Cited
US2640546A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-04 | 1962-11-03 | 1963-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-04 | 1966-11-03 | 1967-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-04 | 1970-11-03 | 1971-05-05 | $7700.00 | Window Closed / Lapsed |