US3374459A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Logging channel disabling circuit
Assignee: Pgac Dev Co
•
Filing: 1965-04-16
•
Granted: 1968-03-19
•
Expires: 1985-04-16
Abstract
No abstract record available.
Inventors
- 👤 William R Rabson
- 👤 Homer M Wilson
- 👤 Torre Leroy C De La
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:22
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/18; G01V3/34; G01V5/00; G01V5/04; G01V5/08; G01V5/10; G01V5/104
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
IN A WELL LOGGING SYSTEM, THE COMBINATION OF, A SUBSURFACE UNIT, A CABLE FOR MOVING SAID UNIT THROUGH A BORE HOLE, A UNIDIRECTIONAL POWER SOURCE AT THE EARTH''S SURFACE AND CONNECTED TO THE UPPER END OF SAID CABLE, A MEASURING DEVICE IN SAID UNIT AND ARRANGED TO PROVIDE AN ELECTRICAL SIGNAL, PROPORTIONAL TO A MEASURED VARIABLE, MEANS FOR CONNECTING SAID ELECTRICAL SIGNAL TO THE LOWER END OF SAID CABLE FOR TRANSMISSION TO THE EARTH''S SURFACE, MEANS IN SAID UNIT UTILIZING POWER TRANSMITTED OVER SAID CABLE FROM SAID SOURCE TO ENERGIZE SAID MEASURING DEVICE, MEANS AT THE EARTH''S SURFACE FOR DEVELOPING A CONTROL PULSE, MEANS FOR APPLYING SAID CONTROL PULSE TO THE UPPER END OF SAID CABLE FOR TRANSMISSION TO SAID UNIT, MEANS IN SAID UNIT FOR RECEIV-
Claim 2
Dependent Claim
127 words
IN A WELL LOGGING SYSTEM, THE COMBINATION OF, A SUBSURFACE UNIT, A CABLE FOR MOVING SAID UNIT THROUGH A BORE HOLE, A UNIDIRECTIONAL POWER SOURCE AT THE EARTH''S SURFACE AND CONNECTED TO THE UPPER END OF SAID CABLE, A MEASURING DEVICE IN SAID UNIT AND ARRANGED TO PROVIDE AN ELECTRICAL SIGNAL, PROPORTIONAL TO A MEASURED VARIABLE, MEANS FOR CONNECTING SAID ELECTRICAL SIGNAL TO THE LOWER END OF SAID CABLE FOR TRANSMISSION TO THE EARTH''S SURFACE, MEANS IN SAID UNIT UTILIZING POWER TRANSMITTED OVER SAID CABLE FROM SAID SOURCE TO ENERGIZE SAID MEASURING DEVICE, MEANS AT THE EARTH''S SURFACE FOR DEVELOPING A CONTROL PULSE, MEANS FOR APPLYING SAID CONTROL PULSE TO THE UPPER END OF SAID CABLE FOR TRANSMISSION TO SAID UNIT, MEANS IN SAID UNIT FOR RECEIV-
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) | 1971-03-19 | 1971-09-18 | 1972-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-19 | 1975-09-18 | 1976-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-19 | 1979-09-18 | 1980-03-19 | $7700.00 | Window Closed / Lapsed |