Patent US3136974A successfully refreshed from Google Patents.
US3136974A
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Method for removing echo effects from seismograms
Assignee: Shell USA Inc
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Filing: 1960-03-28
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Granted: 1964-06-09
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Expires: 1980-03-28
Abstract
No abstract record available.
Inventors
- 👤 Martinus G Sirks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:49
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/28; G01V2210/00; G01V2210/50; G01V2210/56
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A METHOD FOR PRODUCING A SEISMOGRAM IN WHICH THE ECHO EFFECTS OF TWO OR MORE LAYERS ARE SUBSTANTIALLY REDUCED COMPRISING: GENERATING A FIRST PAIR OF AUXILIARY SIGNALS FROM THE ORIGINAL SEISMIC SIGNAL, SAID FIRST PAIR OF AUXILIARY SIGNALS BEING SHIFTED IN TIME WITH RESPECT TO THE ORIGINAL SIGNAL; ADJUSTING THE MAGNITUDES OF THE FIRST PAIR OF AUXILIARY SIGNALS TO DIFFERENT VALUES RELATED TO THE REFLECTION COEFFICIENT OF ONE OF THE LAYERS; GENERATING A SECOND PAIR OF AUXILIARY SIGNALS FROM SAID FIRST PAIR OF AUXILIARY
Claim 2
Independent Claim
84 words
A METHOD FOR PRODUCING A SEISMOGRAM IN WHICH THE ECHO EFFECTS OF TWO OR MORE LAYERS ARE SUBSTANTIALLY REDUCED COMPRISING: GENERATING A FIRST PAIR OF AUXILIARY SIGNALS FROM THE ORIGINAL SEISMIC SIGNAL, SAID FIRST PAIR OF AUXILIARY SIGNALS BEING SHIFTED IN TIME WITH RESPECT TO THE ORIGINAL SIGNAL; ADJUSTING THE MAGNITUDES OF THE FIRST PAIR OF AUXILIARY SIGNALS TO DIFFERENT VALUES RELATED TO THE REFLECTION COEFFICIENT OF ONE OF THE LAYERS; GENERATING A SECOND PAIR OF AUXILIARY SIGNALS FROM SAID FIRST PAIR OF AUXILIARY
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-09 | 1967-12-09 | 1968-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-09 | 1971-12-09 | 1972-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-09 | 1975-12-09 | 1976-06-09 | $7700.00 | Window Closed / Lapsed |