US3263160A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Time domain electromagnetic induction method and apparatus for detection of massive sulfide ore bodies utilizing pulses of asymmetric waveform
Assignee: Newmont Corp
•
Filing: 1962-11-28
•
Granted: 1966-07-26
•
Expires: 1982-11-28
Abstract
No abstract record available.
Inventors
- 👤 William M Dolan
- 👤 George H Mclaughlin
- 👤 Arthur A Brant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:38
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/08; G01V3/10; G01V3/104
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
AN ELECTOMAGNETIC METHOD FO DETECTING THE PRESENCE OF A DEEP-SEATED CONDUCTING ORE BODY SITUATED IN AN ENVIRONMENT EXHIBITING THE ORDER OF 1/100 THE CONDUCTIVITY OF THE ORE, COMPRISING, (A) APPLYING TO A SELECTED REGION OF GROUND SPACED MAGNETIC FIELD PULSES OF ASYMMETRIC FORM, THE LEADING EDGE OF EACH PULSE BEING ROUNDED AND THE TRAILING EDGE BEING A RAMP 2-15 MILLISECONDS TIME DURATION, AND (B) OBTAINING CURVES OF THE VOLTAGES INDUCED IN A NEARBY RECEIVER COIL IMMEDIATELY AFTER THE TERMINATION OF EACH PULSE, THE RATE OF DECAY OF THE INDUCED VOLTAGE CURVES BEING TAKEN AS INDICATIVE OF THE PRESENCE OR ABSENCE OF A SUB-SURFACE CONDUCTING ORE BODY.
Claim 2
Dependent Claim
106 words
AN ELECTOMAGNETIC METHOD FO DETECTING THE PRESENCE OF A DEEP-SEATED CONDUCTING ORE BODY SITUATED IN AN ENVIRONMENT EXHIBITING THE ORDER OF 1/100 THE CONDUCTIVITY OF THE ORE, COMPRISING, (A) APPLYING TO A SELECTED REGION OF GROUND SPACED MAGNETIC FIELD PULSES OF ASYMMETRIC FORM, THE LEADING EDGE OF EACH PULSE BEING ROUNDED AND THE TRAILING EDGE BEING A RAMP 2-15 MILLISECONDS TIME DURATION, AND (B) OBTAINING CURVES OF THE VOLTAGES INDUCED IN A NEARBY RECEIVER COIL IMMEDIATELY AFTER THE TERMINATION OF EACH PULSE, THE RATE OF DECAY OF THE INDUCED VOLTAGE CURVES BEING TAKEN AS INDICATIVE OF THE PRESENCE OR ABSENCE OF A SUB-SURFACE CONDUCTING ORE BODY.
References Cited (Backward Citations)
US2735980A
Cited
USRE24464E
Cited
US2527559A
Cited
US3020471A
Cited
US3090910A
Cited
US3105934A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-25 | 1970-01-24 | 1970-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-25 | 1974-01-24 | 1974-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-25 | 1978-01-24 | 1978-07-26 | $7700.00 | Window Closed / Lapsed |