US3564494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fan filtering seismic data
Assignee: Pan American Petroleum Corp
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Filing: 1966-09-27
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Granted: 1971-02-16
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Expires: 1986-09-27
Abstract
Abstract IN FAN FILTERING SEISMIC DATA TRANCES TO DISCRIMINATE FOR OR AGAINST CERTAIN ARRIVALS ON THE BASIS OF THEIR APPARENT MOVEOUT ACROSS AN ARRAY OF TRACES, THE REQUIREMENT FOR APPLYING DIFFERENT TIME-DOMAIN FILTERS TO THE DIFFERENT TRACES DURING THE FILTERING OPERATION IS AVOIDED BY FIRST APPLYING A SET OF SPECIFIC WEIGHTING FACTORS AND TIME DELAYS TO THE TRACES, FOLLOWED BY SUMMING WITH THE PROPER POLARITIES. PASSING THE SUMMATION TRACE THROUGH A PARTICULAR SINGLE TIME-DOMAIN FILTER GIVES THE SAME OUTPUT AS THE MORE COMPLEX PROCESS USING A DIFFERENT TIMEDOMAIN FILTER FOR EACH TWO TRACES OF THE ARRAY. FANREJECTION FILTERING IS ALSO POSSIBLE.
Inventors
- 👤 Clint W Frasier
- 👤 John L Shanks
- 👤 Sven Treitel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:39
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/28; G01V1/36; G01V1/364; G01V2210/00; G01V2210/20; G01V2210/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |