US2655632A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical resistivity dip meter
Assignee: Standard Oil Development Co
•
Filing: 1951-05-12
•
Granted: 1953-10-13
•
Expires: 1971-05-12
Abstract
No abstract record available.
Inventors
- 👤 Eger V Murphree
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:48
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/02; E21B47/026; Y; Y10; Y10S; Y10S100/00; Y10S100/902
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2340987A
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US2476137A
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US2415636A
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US2393009A
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US2427950A
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US2400678A
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US2502775A
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US2552428A
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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) | 1956-10-12 | 1957-04-13 | 1957-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-12 | 1961-04-13 | 1961-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-12 | 1965-04-13 | 1965-10-13 | $7700.00 | Window Closed / Lapsed |