US2558089A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Geoacoustic apparatus for underground exploration
Assignee: SONIC RES CORP
•
Filing: 1949-12-22
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Granted: 1951-06-26
•
Expires: 1969-12-22
Abstract
No abstract record available.
Inventors
- 👤 Caperton B Horsley
- 👤 Gordon C Seavey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:16
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/02; G01V1/143; G01V1/155
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2054428A
Cited
US2087811A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-25 | 1954-12-25 | 1955-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-25 | 1958-12-25 | 1959-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-25 | 1962-12-25 | 1963-06-26 | $7700.00 | Window Closed / Lapsed |