Patent US3131375A successfully refreshed from Google Patents.
US3131375A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple removal system
Assignee: ExxonMobil Oil Corp
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Filing: 1961-10-25
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Granted: 1964-04-28
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Expires: 1981-10-25
Abstract
No abstract record available.
Inventors
- 👤 Robert J Watson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:30
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/28; G01V2210/00; G01V2210/50; G01V2210/56
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
THE METHOD OF REMOVING FROM A SEISMOGRAM MULTIPLE REFLECTIONS OF SEISMIC ENERGY ORIGINATING FROM SUBSURFACE REFLECTING INTERFACES LOCATED BELOW A SOURCE OF GENERATION OF SAID SEISMIC ENERGY WHICH COMPRISES GENERATING CANCELLATION SIGNALS BY CONVOLVING SELECTED PORTIONS OF SAID SEISMOGRAM FOLLOWING THE FIRST BREAKS OF SAID SEISMOGRAM WITH A REFLECTIVITY FUNCTION OF CHARACTER GIVING RISE TO SAID MULTIPLES, SAID REFLECTIVITY FUNCTION BEING DETERMINED BY THE MAGNITUDES OF THE VELOCITY-DENSITY CONTRASTS OF SAID INTERFACES AND BY TIME DELAYS CORRESPONDING, TO A CLOSE APPROXIMATION, WITH THE TIME OCCURRENCES OF SAID MULTIPLE REFLECTIONS ON SAID SEISMOGRAM RELATIVE TO THEIR ASSOCIATED PRIMARY REFLECTIONS, MODIFYING THE RESULTS OF SAID CONVOLUTION BY TWO FACTORS, FIRST A SURFACE REFLECTIVITY COEFFICIENT AND SECOND A FURTHER CONVOLUTION OF THE RESULTS OF SAID FIRST-MENTIONED CONVOLUTION WITH A FUNCTION OF CHARACTER REPRESENTATIVE OF THE DIFFERENCE BE-
Claim 2
Independent Claim
134 words
THE METHOD OF REMOVING FROM A SEISMOGRAM MULTIPLE REFLECTIONS OF SEISMIC ENERGY ORIGINATING FROM SUBSURFACE REFLECTING INTERFACES LOCATED BELOW A SOURCE OF GENERATION OF SAID SEISMIC ENERGY WHICH COMPRISES GENERATING CANCELLATION SIGNALS BY CONVOLVING SELECTED PORTIONS OF SAID SEISMOGRAM FOLLOWING THE FIRST BREAKS OF SAID SEISMOGRAM WITH A REFLECTIVITY FUNCTION OF CHARACTER GIVING RISE TO SAID MULTIPLES, SAID REFLECTIVITY FUNCTION BEING DETERMINED BY THE MAGNITUDES OF THE VELOCITY-DENSITY CONTRASTS OF SAID INTERFACES AND BY TIME DELAYS CORRESPONDING, TO A CLOSE APPROXIMATION, WITH THE TIME OCCURRENCES OF SAID MULTIPLE REFLECTIONS ON SAID SEISMOGRAM RELATIVE TO THEIR ASSOCIATED PRIMARY REFLECTIONS, MODIFYING THE RESULTS OF SAID CONVOLUTION BY TWO FACTORS, FIRST A SURFACE REFLECTIVITY COEFFICIENT AND SECOND A FURTHER CONVOLUTION OF THE RESULTS OF SAID FIRST-MENTIONED CONVOLUTION WITH A FUNCTION OF CHARACTER REPRESENTATIVE OF THE DIFFERENCE BE-
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) | 1967-04-28 | 1967-10-28 | 1968-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-28 | 1971-10-28 | 1972-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-28 | 1975-10-28 | 1976-04-28 | $7700.00 | Window Closed / Lapsed |