Patent US2953214A successfully refreshed from Google Patents.
US2953214A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seismic exploration
Assignee: Shell USA Inc
•
Filing: 1957-02-27
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Granted: 1960-09-20
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Expires: 1977-02-27
Abstract
No abstract record available.
Inventors
- 👤 Merten Eugen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:33
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)
US1007177A
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US1029261A
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US1998412A
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US2139581A
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US2450366A
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US2550563A
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US2556299A
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US2795287A
Cited
US2773447A
Cited
US2806545A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-20 | 1964-03-21 | 1964-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-20 | 1968-03-21 | 1968-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-20 | 1972-03-21 | 1972-09-20 | $7700.00 | Window Closed / Lapsed |