US3076955A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means and techniques for effecting a mathematical inversion
Assignee: Halliburton Co
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Filing: 1959-03-31
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Granted: 1963-02-05
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Expires: 1979-03-31
Abstract
No abstract record available.
Inventors
- 👤 Jr Richard H Huddleston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:29
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
166 words
IN A LOGGING SYSTEM, A SUB-SYSTEM COMPRISING A POTENTIOMETER-TYPE RESISTANCE HAVING AN ADJUSTABLE TAP THEREON, A SECOND RESISTANCE AND A THIRD RESISTANCE CONNECTED IN SERIES WITH SAID POTENTIOMETER-TYPE RESISTANCE, A SOURCE OF CONSTANT UNIDIRECTIONAL CURRENT HAVING ONE OF ITS TERMINALS CONNECTED TO SAID TAP AND THE OTHER ONE OF ITS TERMINALS CONNECTED TO THE JUNCTION POINT OF SAID SECOND AND THIRD RESISTANCES TO DEVELOP A VOLTAGE ACROSS SAID SECOND RESISTANCE, A SOURCE OF A LOGGING SIGNAL, A CORRECTION SYSTEM COMPARING SAID SIGNAL WITH SAID VOLTAGE AND FUNCTIONING TO ADJUST SAID TAP AND SAID VOLTAGE IN ACCORDANCE WITH SAID SIGNAL, A SOURCE OF ALTERNATING CURRENT HAVING ONE OF ITS TERMINALS CONNECTED TO SAID TAP AND THE OTHER ONE OF ITS TERMINALS CONNECTED TO SAID JUNCTION POINT OF SAID SECOND AND THIRD RESISTANCES, SAID ALTERNATING CURRENT SOURCE BEING CONNECTED IN A SERIES CIRCUIT WITH A PORTION OF SAID POTENTIOMETER-TYPE RESISTANCE AND SAID THIRD RESISTANCE, AND MEANS PRODUCING AN INDICATION OF THE CURRENT IN THE LAST MENTIONED SERIES CIRCUIT.
Claim 2
Dependent Claim
166 words
IN A LOGGING SYSTEM, A SUB-SYSTEM COMPRISING A POTENTIOMETER-TYPE RESISTANCE HAVING AN ADJUSTABLE TAP THEREON, A SECOND RESISTANCE AND A THIRD RESISTANCE CONNECTED IN SERIES WITH SAID POTENTIOMETER-TYPE RESISTANCE, A SOURCE OF CONSTANT UNIDIRECTIONAL CURRENT HAVING ONE OF ITS TERMINALS CONNECTED TO SAID TAP AND THE OTHER ONE OF ITS TERMINALS CONNECTED TO THE JUNCTION POINT OF SAID SECOND AND THIRD RESISTANCES TO DEVELOP A VOLTAGE ACROSS SAID SECOND RESISTANCE, A SOURCE OF A LOGGING SIGNAL, A CORRECTION SYSTEM COMPARING SAID SIGNAL WITH SAID VOLTAGE AND FUNCTIONING TO ADJUST SAID TAP AND SAID VOLTAGE IN ACCORDANCE WITH SAID SIGNAL, A SOURCE OF ALTERNATING CURRENT HAVING ONE OF ITS TERMINALS CONNECTED TO SAID TAP AND THE OTHER ONE OF ITS TERMINALS CONNECTED TO SAID JUNCTION POINT OF SAID SECOND AND THIRD RESISTANCES, SAID ALTERNATING CURRENT SOURCE BEING CONNECTED IN A SERIES CIRCUIT WITH A PORTION OF SAID POTENTIOMETER-TYPE RESISTANCE AND SAID THIRD RESISTANCE, AND MEANS PRODUCING AN INDICATION OF THE CURRENT IN THE LAST MENTIONED SERIES CIRCUIT.
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) | 1966-02-04 | 1966-08-06 | 1967-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-04 | 1970-08-06 | 1971-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-04 | 1974-08-06 | 1975-02-05 | $7700.00 | Window Closed / Lapsed |