US2794949A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic induction method and apparatus for prospecting
Assignee: Individual
•
Filing: 1955-05-10
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Granted: 1957-06-04
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Expires: 1975-05-10
Abstract
No abstract record available.
Inventors
- 👤 Hedstrom Erik Helme Laurentius
- 👤 Tegholm Ruben Valdemar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:24
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/15; G01V3/165
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
A METHOD FOR DETECTOR AND EXPLORING FOR MINERAL ORES, SUNTERRANEAN METAL BODIES AND GEOLOGICAL FORMATIONS COMPRISING THE STEPS OF GENERATING A ROTARY MAGNETIC FIELD, DIRECTING SAID FIELD OVER AN AREA WHILE IT IS EXPLORED, TRAVERSING THE AREA AND THERE MEASURING THE FIELD FOR DETERMINATION OF ANOMALIES THEREIN.
Claim 2
Independent Claim
47 words
A METHOD FOR DETECTOR AND EXPLORING FOR MINERAL ORES, SUNTERRANEAN METAL BODIES AND GEOLOGICAL FORMATIONS COMPRISING THE STEPS OF GENERATING A ROTARY MAGNETIC FIELD, DIRECTING SAID FIELD OVER AN AREA WHILE IT IS EXPLORED, TRAVERSING THE AREA AND THERE MEASURING THE FIELD FOR DETERMINATION OF ANOMALIES THEREIN.
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) | 1960-06-03 | 1960-12-03 | 1961-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-03 | 1964-12-03 | 1965-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-03 | 1968-12-03 | 1969-06-04 | $7700.00 | Window Closed / Lapsed |