Patent US2989135A successfully refreshed from Google Patents.
US2989135A
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Method for seismic surveying
Assignee: Sunoco Inc
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Filing: 1955-08-24
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Granted: 1961-06-20
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Expires: 1975-08-24
Abstract
No abstract record available.
Inventors
- 👤 Jr Russell Pierce
- 👤 William H Cox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:16
CPC Classifications
G; G01; G01V; G01V1/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2578133A
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US2732906A
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US2767389A
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US2634398A
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US2795287A
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US2882988A
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US2740945A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |