US2611004A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Geophysical exploration
Assignee: Geophysical Exploration Co
•
Filing: 1948-09-15
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Granted: 1952-09-16
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Expires: 1968-09-15
Abstract
No abstract record available.
Inventors
- 👤 Arthur A Brant
- 👤 Everett A Gilbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:03
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/02; G01V3/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
THE GEOPHYSICAL METHOD OF DETECTING PRESENCE OF SULPHIDES IN A MEDIUM PERMEATED BY AN ELECTROLYTE SAID METHOD COMPRISING: INSERTING A PAIR OF CHARGING STAKES INTO THE EARTH AT SPACED POINTS; INSERTING AN ARRAY OF THREE PICK-UP ELECTRODES INTO THE EARTH; APPLYING A UNIDIRECTIONAL CHARGING CURRENT INTO THE EARTH THROUGH THE CHARGING ELECTRODES; INTERRUPTING SAID CURRENT WITHIN A TIME PERIOD OF 30 SECONDS; AND MEASURING THE RESULTANT TRANSIENT POTENTIAL APPEARING ACROSS PAIRS OF SAID PICK-UP ELECTRODES, SAID MEASUREMENT BEING RESTRICTED TO THE TRANSIENT POTENTIAL HAVING THE SAME DIRECTIVE SENSE AS THE CHARGING CURRENT AND WHICH DECAYS TO ONE HALF PEAK VALUE WITHIN 0.5 SECOND.
Claim 2
Dependent Claim
103 words
THE GEOPHYSICAL METHOD OF DETECTING PRESENCE OF SULPHIDES IN A MEDIUM PERMEATED BY AN ELECTROLYTE SAID METHOD COMPRISING: INSERTING A PAIR OF CHARGING STAKES INTO THE EARTH AT SPACED POINTS; INSERTING AN ARRAY OF THREE PICK-UP ELECTRODES INTO THE EARTH; APPLYING A UNIDIRECTIONAL CHARGING CURRENT INTO THE EARTH THROUGH THE CHARGING ELECTRODES; INTERRUPTING SAID CURRENT WITHIN A TIME PERIOD OF 30 SECONDS; AND MEASURING THE RESULTANT TRANSIENT POTENTIAL APPEARING ACROSS PAIRS OF SAID PICK-UP ELECTRODES, SAID MEASUREMENT BEING RESTRICTED TO THE TRANSIENT POTENTIAL HAVING THE SAME DIRECTIVE SENSE AS THE CHARGING CURRENT AND WHICH DECAYS TO ONE HALF PEAK VALUE WITHIN 0.5 SECOND.
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) | 1955-09-16 | 1956-03-17 | 1956-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-16 | 1960-03-17 | 1960-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-16 | 1964-03-17 | 1964-09-16 | $7700.00 | Window Closed / Lapsed |