US2808894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seismic wave generation
Assignee: Pan American Petroleum Corp
•
Filing: 1953-04-27
•
Granted: 1957-10-08
•
Expires: 1973-04-27
Abstract
No abstract record available.
Inventors
- 👤 Joseph D Eisler
- 👤 Silverman Daniel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:52
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/02; G01V1/104; G01V1/13
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2087702A
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US2064451A
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US2233992A
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US2384851A
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US2503904A
Cited
US2556299A
Cited
US2569411A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-07 | 1961-04-08 | 1961-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-07 | 1965-04-08 | 1965-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-07 | 1969-04-08 | 1969-10-08 | $7700.00 | Window Closed / Lapsed |