US2945541A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well packer
Assignee: Union Oil Company of California
•
Filing: 1955-10-17
•
Granted: 1960-07-19
•
Expires: 1975-10-17
Abstract
No abstract record available.
Inventors
- 👤 George P Maly
- 👤 Roland F Krueger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:26
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/12; E21B33/1208; Y; Y10; Y10S; Y10S277/00; Y10S277/903; Y10S285/00; Y10S285/925
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1586514A
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US1998915A
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US2210546A
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US2221775A
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US2425514A
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US2370832A
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US2401539A
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US2439562A
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US2438673A
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US2523091A
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US2591044A
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US2605637A
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US2742968A
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US2814947A
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US2781663A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-19 | 1964-01-18 | 1964-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-19 | 1968-01-18 | 1968-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-19 | 1972-01-18 | 1972-07-19 | $7700.00 | Window Closed / Lapsed |