US3312933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Time variant inverse filter
Assignee: Mobil Oil AS
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Filing: 1964-04-23
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Granted: 1967-04-04
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Expires: 1984-04-23
Abstract
No abstract record available.
Inventors
- 👤 Philip L Lawrence
- 👤 Jack T Nipper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:54
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/48; G06G7/62; G06G7/623; G01; G01V; G01V1/00; G01V1/28; G01V1/36; G01V1/364; G01V1/368; G01V2210/00; G01V2210/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
205 words
THE METHOD OF CONVERTING A SEISMOGRAM HAVING A FREQUENCY CONTENT WHICH VARIES IN ACCORDANCE WITH THE VARIATION OF THE FREQUENCY ATTENUATION OF THE EARTH AND INSTRUMENTS INTO A SEISMOGRAM HAVING A TIME INVARIANT FREQUENCY CONTENT COMPRISING: GENERATING A FIRST ELECTRICAL SIGNAL REPRESENTATIVE OF SAID SEISMOGRAM, APPLYING SAID FIRST ELECTRICAL SIGNAL TO A DIFFERENTIATOR TO PRODUCE A SECOND ELECTRICAL SIGNAL REPRESENTATIVE OF THE MAGNITUDE OF THE HIGHER FREQUENCY COMPONENTS OF SAID SEISMOGRAM, APPLYING SAID FIRST ELECTRICAL SIGNAL TO AN INTERGRATOR TO PRODUCE A THIRD ELECTRICAL SIGNAL REPRESENTATIVE OF THE MAGNITUDE OF THE LOWER FREQUENCY COMPONENTS OF SAID SEISMOGRAM, GENERATING FROM THE RATIO OF SAID FIRST AND SECOND ELECTRICAL SIGNALS A CONTROL SIGNAL PROPORTIONAL TO THE ABSOLUTE VALUE OF SAID RATIO, SAID CONTROL SIGNAL VARYING IN ACCORDANCE WITH THE VARIATION IN FREQUENCY CONTENT OF SAID SEISMOGRAM WITH TIME, APPLYING SAID FIRST, SECOND AND THIRD ELECTRICAL SIGNALS TO AMPLITUDE CONTROLLERS, APPLYING SAID CONTROL SIGNAL TO SAID AMPLITUDE CONTROLLERS TO CHANGE THE MAGNITUDES OF SAID ELECTRICAL SIGNALS IN ACCORDANCE WITH THE MAGNITUDE OF SAID CONTROL SIGNAL, APPLYING THE OUTPUTS OF SAID AMPLITUDE CONTROLLERS TO A MIXER TO PRODUCE A RESULTANT SIGNAL HAVING AN INVARIANT FREQUENCY CONTENT, AND CONVERTING SAID RESULTANT SIGNAL TO A SEISMOGRAM HAVING AN INVARIANT FREQUENCY CONTENT.
Claim 2
Independent Claim
205 words
THE METHOD OF CONVERTING A SEISMOGRAM HAVING A FREQUENCY CONTENT WHICH VARIES IN ACCORDANCE WITH THE VARIATION OF THE FREQUENCY ATTENUATION OF THE EARTH AND INSTRUMENTS INTO A SEISMOGRAM HAVING A TIME INVARIANT FREQUENCY CONTENT COMPRISING: GENERATING A FIRST ELECTRICAL SIGNAL REPRESENTATIVE OF SAID SEISMOGRAM, APPLYING SAID FIRST ELECTRICAL SIGNAL TO A DIFFERENTIATOR TO PRODUCE A SECOND ELECTRICAL SIGNAL REPRESENTATIVE OF THE MAGNITUDE OF THE HIGHER FREQUENCY COMPONENTS OF SAID SEISMOGRAM, APPLYING SAID FIRST ELECTRICAL SIGNAL TO AN INTERGRATOR TO PRODUCE A THIRD ELECTRICAL SIGNAL REPRESENTATIVE OF THE MAGNITUDE OF THE LOWER FREQUENCY COMPONENTS OF SAID SEISMOGRAM, GENERATING FROM THE RATIO OF SAID FIRST AND SECOND ELECTRICAL SIGNALS A CONTROL SIGNAL PROPORTIONAL TO THE ABSOLUTE VALUE OF SAID RATIO, SAID CONTROL SIGNAL VARYING IN ACCORDANCE WITH THE VARIATION IN FREQUENCY CONTENT OF SAID SEISMOGRAM WITH TIME, APPLYING SAID FIRST, SECOND AND THIRD ELECTRICAL SIGNALS TO AMPLITUDE CONTROLLERS, APPLYING SAID CONTROL SIGNAL TO SAID AMPLITUDE CONTROLLERS TO CHANGE THE MAGNITUDES OF SAID ELECTRICAL SIGNALS IN ACCORDANCE WITH THE MAGNITUDE OF SAID CONTROL SIGNAL, APPLYING THE OUTPUTS OF SAID AMPLITUDE CONTROLLERS TO A MIXER TO PRODUCE A RESULTANT SIGNAL HAVING AN INVARIANT FREQUENCY CONTENT, AND CONVERTING SAID RESULTANT SIGNAL TO A SEISMOGRAM HAVING AN INVARIANT FREQUENCY CONTENT.
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) | 1970-04-03 | 1970-10-03 | 1971-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-03 | 1974-10-03 | 1975-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-03 | 1978-10-03 | 1979-04-04 | $7700.00 | Window Closed / Lapsed |