US2966627A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for electrical prospecting
Assignee: Seismograph Service Corp
•
Filing: 1956-11-14
•
Granted: 1960-12-27
•
Expires: 1976-11-14
Abstract
No abstract record available.
Inventors
- 👤 James E Hawkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:50
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/02; G01V3/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1912036A
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US2156259A
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US2642477A
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US2652530A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-27 | 1964-06-27 | 1964-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-27 | 1968-06-27 | 1968-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-27 | 1972-06-27 | 1972-12-27 | $7700.00 | Window Closed / Lapsed |