US2738013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil well tool
Assignee: Oil Recovery Corp
•
Filing: 1952-09-05
•
Granted: 1956-03-13
•
Expires: 1972-09-05
Abstract
No abstract record available.
Inventors
- 👤 Lynes John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:12
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/12; E21B33/124; E21B33/1208; E21B33/1216
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1513228A
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US1549168A
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US1831724A
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US2082113A
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US2159640A
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US2196658A
Cited
US2227731A
Cited
US2611437A
Cited
US2516580A
Cited
US2516581A
Cited
US2449514A
Cited
US2637400A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-13 | 1959-09-12 | 1960-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-13 | 1963-09-12 | 1964-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-13 | 1967-09-12 | 1968-03-13 | $7700.00 | Window Closed / Lapsed |