US3270316A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acoustic attenuation logging system
Assignee: Texaco Inc
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Filing: 1963-02-07
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Granted: 1966-08-30
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Expires: 1983-02-07
Abstract
No abstract record available.
Inventors
- 👤 Jr Hugh O Walker
- 👤 Kerry D Savage
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:26
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/40; G01V1/44; G01V1/48; G01V1/50
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
142 words
IN AN ACOUSTIC LOGGING SYSTEM FOR USE IN A BOREHOLE; THE COMBINATION COMPRISING MEANS FOR DEVELOPING A FIRST ELECTRICAL SIGNAL IN RESPONSE TO ACOUSTIC ENERGY IN THE BOREHOLE, SAID ELECTRICAL SIGNAL HAVING A SERIES OF ALTERNATIONS; MEANS FOR DEVELOPING A SECOND ELECTRICAL SIGNAL IN RESPONSE TO ACOUSTIC ENERGY AT A LOCATION IN THE BOREHOLE SPACED LONGITUDINALLY FROM SAID FIRST ELECTRICAL SIGNAL MEANS, SAID SECOND ELECTRICAL SIGNAL HAVING A SERIES OF ALTERNATIONS; MEANS FOR PRODUCING A FURTHER FIRST AND SECOND SIGNAL WHOSE AMPLITUDE IS A LOGARITHMIC FUNCTION OF THE AMPLITUDE OF SAID RESPECTIVE FIRST AND SECOND ELECTRICAL SIGNALS; GATING MEANS FOR PASSING A CORRESPONDING PORTION OF EACH OF SAID FURTHER FIRST AND SECOND SIGNALS, AND DIFFERENCE MEASURING MEANS FOR MEASURING THE AMPLITUDE DIFFERENCE OF SAID GATED PORTIONS OF SAID FURTHER FIRST AND SECOND SIGNALS, SAID DIFFERENCE SIGNAL BEING INDICATIVE OF ATTENUATION IN DECIBELS.
References Cited (Backward Citations)
US3011582A
Cited
US3102251A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-29 | 1970-02-28 | 1970-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-29 | 1974-02-28 | 1974-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-29 | 1978-02-28 | 1978-08-30 | $7700.00 | Window Closed / Lapsed |