Patent US3211252A successfully refreshed from Google Patents.
US3211252A
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Method and apparatus using seismic energy for detecting discontinuities
Assignee: Shell USA Inc
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Filing: 1962-03-29
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Granted: 1965-10-12
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Expires: 1982-03-29
Abstract
No abstract record available.
Inventors
- 👤 Jr Noyes D Smith
- 👤 Charles B Vogel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:03
CPC Classifications
G; G01; G01N; G01N29/00; G01N29/04; G01N29/043; E; E21; E21B; E21B47/00; E21B47/02; G01V; G01V1/00; G01V1/40; G01V1/44; G01V1/46
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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Cited
US2825044A
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US2795133A
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US2893239A
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US2943694A
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US3140600A
Cited
US3132510A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-11 | 1969-04-12 | 1969-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-11 | 1973-04-12 | 1973-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-11 | 1977-04-12 | 1977-10-12 | $7700.00 | Window Closed / Lapsed |