US2859828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Down hole hydraulic pump for formation testing
Assignee: Jersey Production Research Co
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Filing: 1953-12-14
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Granted: 1958-11-11
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Expires: 1973-12-14
Abstract
No abstract record available.
Inventors
- 👤 Philip S Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:27
CPC Classifications
E; E21; E21B; E21B49/00; E21B49/08; E21B49/084; E21B33/00; E21B33/10; E21B33/12; E21B33/124; E21B33/1243; E21B49/081
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-10 | 1962-05-12 | 1962-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-10 | 1966-05-12 | 1966-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-10 | 1970-05-12 | 1970-11-11 | $7700.00 | Window Closed / Lapsed |