US2589159A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hold-down slip assembly
Assignee: Standard Oil Development Co
•
Filing: 1948-02-19
•
Granted: 1952-03-11
•
Expires: 1968-02-19
Abstract
No abstract record available.
Inventors
- 👤 Albert L Stone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:08
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1400940A
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US1560701A
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US1556094A
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US1650101A
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US1973809A
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US2076042A
Cited
US2231923A
Cited
US2287432A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-11 | 1955-09-10 | 1956-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-11 | 1959-09-10 | 1960-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-11 | 1963-09-10 | 1964-03-11 | $7700.00 | Window Closed / Lapsed |