Patent US3181117A successfully refreshed from Google Patents.
US3181117A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signal processing systems
Assignee: Schlumberger Well Surveying Corp
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Filing: 1959-04-17
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Granted: 1965-04-27
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Expires: 1979-04-17
Abstract
No abstract record available.
Inventors
- 👤 William J Sloughter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:42
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/18; G01V3/26; G01V3/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
IN APPARATUS FOR INVESTIGATING EARTH FORMATIONS TRAVERSED BY A BOREHOLE UTILIZING EXPOLRING MEANS ADAPTED TO BE LOWERED INTO THE BOREHOLE AND PROVIDING AND ELECTRICAL SIGNAL REPRESENTING A CHARACTERISTIC OF THE EARTH FORMATIONS, A SIGNAL PROCESSING SYSTEM COMPRISING: SIGNAL TRANSLATING CIRCUIT MEANS HAVING A LOW IMPEDANCE OUTPUT CIRCUIT AND RESPONSIVE TO THE AFORESAID SIGNAL FOR DEVELOPING ACROSS SUCH OUTPUT CIRCUIT A REPLICA OF SAID SIGNAL; A PLURALITY OF STORAGE CAPACITORS; SWITCH MEANS ADAPTED TO RESPOND TO MOVEMENT OF THE EXPLORING MEANS THROUGH THE BOREHOLE FOR COUPLING SAID OUTPUT CIRCUIT TO SUCCESSIVE ONES OF SAID STORAGE CAPACITORS AND FOR SUBSEQUENTLY ESTABLISHING AT LEAST TWO INDEPENDENT COUPLING CIRCUITS WITH
Claim 2
Dependent Claim
106 words
IN APPARATUS FOR INVESTIGATING EARTH FORMATIONS TRAVERSED BY A BOREHOLE UTILIZING EXPOLRING MEANS ADAPTED TO BE LOWERED INTO THE BOREHOLE AND PROVIDING AND ELECTRICAL SIGNAL REPRESENTING A CHARACTERISTIC OF THE EARTH FORMATIONS, A SIGNAL PROCESSING SYSTEM COMPRISING: SIGNAL TRANSLATING CIRCUIT MEANS HAVING A LOW IMPEDANCE OUTPUT CIRCUIT AND RESPONSIVE TO THE AFORESAID SIGNAL FOR DEVELOPING ACROSS SUCH OUTPUT CIRCUIT A REPLICA OF SAID SIGNAL; A PLURALITY OF STORAGE CAPACITORS; SWITCH MEANS ADAPTED TO RESPOND TO MOVEMENT OF THE EXPLORING MEANS THROUGH THE BOREHOLE FOR COUPLING SAID OUTPUT CIRCUIT TO SUCCESSIVE ONES OF SAID STORAGE CAPACITORS AND FOR SUBSEQUENTLY ESTABLISHING AT LEAST TWO INDEPENDENT COUPLING CIRCUITS WITH
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) | 1968-04-26 | 1968-10-26 | 1969-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-26 | 1972-10-26 | 1973-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-26 | 1976-10-26 | 1977-04-27 | $7700.00 | Window Closed / Lapsed |