US3217550A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Geothermal prospecting
Assignee: Geothermal Surveys Inc
•
Filing: 1962-06-11
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Granted: 1965-11-16
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Expires: 1982-06-11
Abstract
No abstract record available.
Inventors
- 👤 Joseph H Birman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:50
CPC Classifications
G; G01; G01V; G01V9/00; G01V9/005
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
119 words
THE METHOD OF GEOTHERMAL PROSPECTING IN AN AREA TO DETERMINE THE DEPTH AND ORIENTATION OF A SUBSURFACE BODY HAVING LOW TEMPERATURE ANOMALOUS THERMAL CHARACTERISTICS WHICH COMPRISES THE STEPS OF: (A) LOCATING A PLURALITY OF TEMPERATURE SENSORS AT SPACED POINTS AND EACH BURIED TO A SUBSTANTIALLY IDENTICAL DEPTH SUFFICIENT TO AVOID DIURNAL TEMPERATURE CHANGES BUT RESPONSIVE TO SEASONAL TEMPERATURE CHANGES; (B) ALLOWING THE SEVERAL SENSORS TO REACH EQUILIBRIUM WITH THE IMMEDIATELY SURROUNDING FORMATION; (C) DETERMINING A FIRST TEMPERATURE AT EACH SENSOR; AND (D) DETERMINING AT LEAST ONE ADDITIONAL DIFFERENT TEMPERATURE AT EACH SENSOR AFTER AN INTERVAL OF TIME WHEREBY THE SENSORS SHOWING THE LOWER TEMPERATURES AND LOWER RATE OF DRIFT WILL ESTABLISH THE EXISTENCE AND GENERAL DEPTH OF THE BODY.
References Cited (Backward Citations)
US2403704A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-15 | 1969-05-17 | 1969-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-15 | 1973-05-17 | 1973-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-15 | 1977-05-17 | 1977-11-16 | $7700.00 | Window Closed / Lapsed |