US2779915A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Borehole electrodes
Assignee: SIGUAL OIL AND GAS Co
•
Filing: 1952-01-08
•
Granted: 1957-01-29
•
Expires: 1972-01-08
Abstract
No abstract record available.
Inventors
- 👤 Moon James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:07
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/18; G01V3/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2228223A
Cited
US2247417A
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US2364159A
Cited
US2404622A
Cited
US2524031A
Cited
US2653294A
Cited
US2581979A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-29 | 1960-07-30 | 1961-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-29 | 1964-07-30 | 1965-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-29 | 1968-07-30 | 1969-01-29 | $7700.00 | Window Closed / Lapsed |