US2660247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Retrievable well packer
Assignee: SWEET OIL WELL EQUIPMENT Inc
•
Filing: 1949-09-13
•
Granted: 1953-11-24
•
Expires: 1969-09-13
Abstract
No abstract record available.
Inventors
- 👤 Cecil H Sweet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:43
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/12; E21B33/128
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US56234A
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US254649A
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US927874A
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US1034737A
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US2052786A
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US2093129A
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US2339319A
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US2390372A
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US2418493A
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US2426370A
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US2576673A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-23 | 1957-05-25 | 1957-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-23 | 1961-05-25 | 1961-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-23 | 1965-05-25 | 1965-11-24 | $7700.00 | Window Closed / Lapsed |