US2653009A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination stabilizer and hydraulic pack-off kelly joint
Assignee: Standard Oil Development Co
•
Filing: 1949-12-16
•
Granted: 1953-09-22
•
Expires: 1969-12-16
Abstract
No abstract record available.
Inventors
- 👤 Ragland Douglas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:37
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/03; E21B33/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US385600A
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US556718A
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US1501994A
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US1557915A
Cited
US2177601A
Cited
US2516580A
Cited
US2516581A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-21 | 1957-03-23 | 1957-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-21 | 1961-03-23 | 1961-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-21 | 1965-03-23 | 1965-09-22 | $7700.00 | Window Closed / Lapsed |