Patent US4040426A successfully refreshed from Google Patents.
Patent US3209855A successfully refreshed from Google Patents.
US3209855A
Expired / Lapsed
US
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Method and means for reducing strong, early arrival waves in continuous wave operations
Assignee: Atlantic Richfield Co
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Filing: 1960-11-01
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Granted: 1965-10-05
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Expires: 1980-11-01
Abstract
No abstract record available.
Inventors
- 👤 Jr Tom Prickett
- 👤 John P Woods
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:34
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/12; G06G7/19; G06G7/1914
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
THE METHOD OF OBTAINING GEOPHYSICAL MEASUREMENTS COMPRISING THE STEPS OF (A) GENERATING IN THE EARTH USEFUL SEISMIC WAVES OF CYCLICALLY VARYING FREQUENCY, (B) RECEIVING BY MEANS OF A GEOPHONE SAID USEFUL WAVES AND NOISE ACCOMPANYING SAID WAVES AT A LOCATION REMOTE FROM THE SOURCE OF SAID GENERATED WAVES AFTER A TIME INTERVAL LATER THAN THE TIME WHEN SAID WAVES WERE GENERATED, SAID TIME INTERVAL BEING EQUAL TO THE TRAVEL TIME OF SAID USEFUL SEISMIC WAVES TO THE RECEIVER, (C) TRANSFORMING SAID WAVES AND NOISE RECEIVED BY SAID RECEIVER INTO A FIRST ELECTRICAL SIGNAL, (D) PRODUCING A SECOND ELECTRICAL SIGNAL HAVING A FREQUENCY IN RESPECT TO TIME SUBSTANTIALLY IN PHASE WITH THE VARYING FREQUENCY OF SAID GENERATED USEFUL SEISMIC WAVES, (E) CONTINUOUSLY TIME DELAYING SAID SECOND ELECTRICAL SIGNAL, (F) FILTERING SAID FIRST SIGNAL BY MEANS OF A NARROW BAND FILTER IN ORDER TO SEPARATE THE PORTION OF THE SIGNAL
Claim 2
Independent Claim
148 words
THE METHOD OF OBTAINING GEOPHYSICAL MEASUREMENTS COMPRISING THE STEPS OF (A) GENERATING IN THE EARTH USEFUL SEISMIC WAVES OF CYCLICALLY VARYING FREQUENCY, (B) RECEIVING BY MEANS OF A GEOPHONE SAID USEFUL WAVES AND NOISE ACCOMPANYING SAID WAVES AT A LOCATION REMOTE FROM THE SOURCE OF SAID GENERATED WAVES AFTER A TIME INTERVAL LATER THAN THE TIME WHEN SAID WAVES WERE GENERATED, SAID TIME INTERVAL BEING EQUAL TO THE TRAVEL TIME OF SAID USEFUL SEISMIC WAVES TO THE RECEIVER, (C) TRANSFORMING SAID WAVES AND NOISE RECEIVED BY SAID RECEIVER INTO A FIRST ELECTRICAL SIGNAL, (D) PRODUCING A SECOND ELECTRICAL SIGNAL HAVING A FREQUENCY IN RESPECT TO TIME SUBSTANTIALLY IN PHASE WITH THE VARYING FREQUENCY OF SAID GENERATED USEFUL SEISMIC WAVES, (E) CONTINUOUSLY TIME DELAYING SAID SECOND ELECTRICAL SIGNAL, (F) FILTERING SAID FIRST SIGNAL BY MEANS OF A NARROW BAND FILTER IN ORDER TO SEPARATE THE PORTION OF THE SIGNAL
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) | 1968-10-04 | 1969-04-05 | 1969-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-04 | 1973-04-05 | 1973-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-04 | 1977-04-05 | 1977-10-05 | $7700.00 | Window Closed / Lapsed |