US2866512A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of subsurface exploration by sonic means
Assignee: Individual
•
Filing: 1953-07-03
•
Granted: 1958-12-30
•
Expires: 1973-07-03
Abstract
No abstract record available.
Inventors
- 👤 Jr Louis R Padberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:21
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2253975A
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US2354548A
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US2364209A
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US2436377A
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US2463328A
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US2440971A
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US2599586A
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US2651027A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-29 | 1962-06-30 | 1962-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-29 | 1966-06-30 | 1966-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-29 | 1970-06-30 | 1970-12-30 | $7700.00 | Window Closed / Lapsed |