Patent US3176478A successfully refreshed from Google Patents.
Patent US3223967A successfully refreshed from Google Patents.
US3223967A
Expired / Lapsed
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Eliminating seismic interference waves by a cancellation procedure
Assignee: Pan American Petroleum Corp
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Filing: 1962-11-23
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Granted: 1965-12-14
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Expires: 1982-11-23
Abstract
No abstract record available.
Inventors
- 👤 Charles C Lash
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:44
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/28; G01V1/36; G01V1/364; G01V2210/00; G01V2210/30; G01V2210/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
204 words
THE METHOD OF SUBSTANTIALLY ELIMINATING A SEISMIC INTERFERENCE WAVE FROM ONE OF A PLURALITY OF PHONOGRAPHICALLY REPRODUCIBLE SEISMIC DATA TRACES REPRESENTING THE SEISMIC WAVES REFLECTED FROM A PLURALITY OF HORIZONTALLY SPACED SUBSURFACE REFLECTION POINTS AND RECEIVED AT A CORRESPONDING PLURALITY OF RECEPTION POINTS SPACED FROM EACH OTHER AND FROM A POINT WHERE SAID SEISMIC WAVES ARE INITIATED, WHICH METHOD COMPRISES THE STEPS OF REPRODUCING A PLURALITY OF SAID TRACES REPRESENTING ADJOINING ONES OF SAID RECEPTION POINTS AND INCLUDING SAID ONE POINT, DELAYING THE REPRODUCTION OF SOME OF SAID REPRODUCED TRACES RELATIVE TO OTHERS SO AS TO BRING SAID INTERFERENCE WAVE INTO SUBSTANTIAL TIME COINCIDENCE ON ALL OF SAID REPRODUCED TRACES, ADDING SAID REPRODUCED TRACES TOGETHER INTO A SUMMATION TRACE WHEREIN SAID INTERFERENCE WAVE IS MAXIMIZED IN AMPLITUDE AND OPTIMIZED IN WAVE FORM, ADJUSTING THE RELATIVE AMPLITUDE OF SAID SUMMATION TRACE AND SAID ONE TRACE TO BRING THE AMPLITUDE OF SAID INTERFERENCE WAVE TO SUBSTANTIALLY THE SAME LEVEL THEREIN, SUBTRACTIVELY COMBINING SAID SUMMATION TRACE AND SAID ONE TRACE WITH SAID INTERFERENCE WAVE IN TIME COINCIDENCE THEREIN, WHEREBY SAID INTERFERENCE WAVE IS SUBSTANTIALLY CANCELED IN SAID ONE TRACE, AND DISPLAYING SAID ONE TRACE FOR INTERPRETATION OF DATA WHICH MAY HAVE BEEN OBSCURED BY SAID INTERFERENCE WAVE.
Claim 2
Independent Claim
204 words
THE METHOD OF SUBSTANTIALLY ELIMINATING A SEISMIC INTERFERENCE WAVE FROM ONE OF A PLURALITY OF PHONOGRAPHICALLY REPRODUCIBLE SEISMIC DATA TRACES REPRESENTING THE SEISMIC WAVES REFLECTED FROM A PLURALITY OF HORIZONTALLY SPACED SUBSURFACE REFLECTION POINTS AND RECEIVED AT A CORRESPONDING PLURALITY OF RECEPTION POINTS SPACED FROM EACH OTHER AND FROM A POINT WHERE SAID SEISMIC WAVES ARE INITIATED, WHICH METHOD COMPRISES THE STEPS OF REPRODUCING A PLURALITY OF SAID TRACES REPRESENTING ADJOINING ONES OF SAID RECEPTION POINTS AND INCLUDING SAID ONE POINT, DELAYING THE REPRODUCTION OF SOME OF SAID REPRODUCED TRACES RELATIVE TO OTHERS SO AS TO BRING SAID INTERFERENCE WAVE INTO SUBSTANTIAL TIME COINCIDENCE ON ALL OF SAID REPRODUCED TRACES, ADDING SAID REPRODUCED TRACES TOGETHER INTO A SUMMATION TRACE WHEREIN SAID INTERFERENCE WAVE IS MAXIMIZED IN AMPLITUDE AND OPTIMIZED IN WAVE FORM, ADJUSTING THE RELATIVE AMPLITUDE OF SAID SUMMATION TRACE AND SAID ONE TRACE TO BRING THE AMPLITUDE OF SAID INTERFERENCE WAVE TO SUBSTANTIALLY THE SAME LEVEL THEREIN, SUBTRACTIVELY COMBINING SAID SUMMATION TRACE AND SAID ONE TRACE WITH SAID INTERFERENCE WAVE IN TIME COINCIDENCE THEREIN, WHEREBY SAID INTERFERENCE WAVE IS SUBSTANTIALLY CANCELED IN SAID ONE TRACE, AND DISPLAYING SAID ONE TRACE FOR INTERPRETATION OF DATA WHICH MAY HAVE BEEN OBSCURED BY SAID INTERFERENCE WAVE.
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) | 1968-12-13 | 1969-06-14 | 1969-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-13 | 1973-06-14 | 1973-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-13 | 1977-06-14 | 1977-12-14 | $7700.00 | Window Closed / Lapsed |