Patent US2456401A successfully refreshed from Google Patents.
US2456401A
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Interference eliminator for seismic recording systems
Assignee: Shell Development Co
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Filing: 1945-09-24
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Granted: 1948-12-14
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Expires: 1965-09-24
Abstract
No abstract record available.
Inventors
- 👤 Ronald P Gilmore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:27
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1630346A
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US1543668A
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US1544622A
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GB427796A
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US2164196A
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US2161418A
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US2263519A
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US2296754A
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US2294627A
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US2438217A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-12-14 | 1952-06-14 | 1952-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-12-14 | 1956-06-14 | 1956-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-12-14 | 1960-06-14 | 1960-12-14 | $7700.00 | Window Closed / Lapsed |