Patent US2987701A successfully refreshed from Google Patents.
US2987701A
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Methods and apparatus for eliminating singing components from seismic signals
Assignee: California Research LLC
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Filing: 1955-05-31
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Granted: 1961-06-06
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Expires: 1975-05-31
Abstract
No abstract record available.
Inventors
- 👤 Wayne W Grannemann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:38
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/28; G01V1/36; G01V1/364; G01V2210/00; G01V2210/20; G01V2210/21
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2733412A
Cited
US2184313A
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US2304740A
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US2294627A
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US2438217A
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US2450818A
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US2657373A
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US2634398A
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US2685079A
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US2713676A
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US2807797A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-05 | 1964-12-05 | 1965-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-05 | 1968-12-05 | 1969-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-05 | 1972-12-05 | 1973-06-06 | $7700.00 | Window Closed / Lapsed |