Patent US3297983A successfully refreshed from Google Patents.
US3297983A
Expired / Lapsed
US
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Methods and apparatus for acoustic well logging
Assignee: Mobil Oil AS
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Filing: 1959-06-23
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Granted: 1967-01-10
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Expires: 1979-06-23
Abstract
No abstract record available.
Inventors
- 👤 Gerald C Summers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:07
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/40; G01V1/44
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
93 words
A DOWNHOLE INSTRUMENT FOR ACOUSTICAL WELL LOGGING COMPRISING: A RECEIVER CAPABLE OF RECEIVING AND CONVERTING AN ACOUSTICAL IMPULSE INTO AN ALTERNATING ELECTRICAL SIGNAL; A NORMALLY CONDUCTING AMPLIFYING CIRCUIT, SAID RECEIVER BEING COUPLED TO SAID AMPLIFYING CIRCUIT; A TRIGGER CIRCUIT, SAID TRIGGER CIRCUIT BEING COUPLED TO SAID AMPLIFYING CIRCUIT TO EFFECTIVELY SILENCE SAID AMPLIFYING CIRCUIT, SAID TRIGGER CIRCUIT BEING ACTUATED BY A SIGNAL OF PREDETERMINED POLARITY AND MAGNITUDE, THE POLARITY OF SAID SIGNAL BEING CHOSEN TO ACTUATE SAID TRIGGER CIRCUIT AFTER THE AMPLIFYING CIRCUIT HAS REPRODUCED AT LEAST A HALF CYCLE OF THE ELECTRICAL
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-09 | 1970-07-11 | 1971-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-09 | 1974-07-11 | 1975-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-09 | 1978-07-11 | 1979-01-10 | $7700.00 | Window Closed / Lapsed |