US2839721A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for logging the ocean floor
Assignee: ConocoPhillips Co
•
Filing: 1955-10-21
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Granted: 1958-06-17
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Expires: 1975-10-21
Abstract
No abstract record available.
Inventors
- 👤 Witte Leendert De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:33
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/02; G01V3/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
IN AN APPARATUS FOR DETERMINING THE RESISTIVITY OF GEOLOGICAL STRATA UNDERLYING A BODY OF WATER, INCLUDING AN EXPLORING ELECTRODE, A GUARD ELECTRODE ELECTRICALLY INSULATED FROM THE EXPLORING ELECTRODE, A CABLE CONNECTED TO SAID ELECTRODES FOR DRAGGING SAID ELECTRODES ALONG THE BOTTOM OF THE BODY OF WATER A SOUCE OF ELECTRICAL ENERGY
Claim 2
Dependent Claim
51 words
IN AN APPARATUS FOR DETERMINING THE RESISTIVITY OF GEOLOGICAL STRATA UNDERLYING A BODY OF WATER, INCLUDING AN EXPLORING ELECTRODE, A GUARD ELECTRODE ELECTRICALLY INSULATED FROM THE EXPLORING ELECTRODE, A CABLE CONNECTED TO SAID ELECTRODES FOR DRAGGING SAID ELECTRODES ALONG THE BOTTOM OF THE BODY OF WATER A SOUCE OF ELECTRICAL ENERGY
References Cited (Backward Citations)
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Cited
US2446303A
Cited
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Cited
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Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-16 | 1961-12-16 | 1962-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-16 | 1965-12-16 | 1966-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-16 | 1969-12-16 | 1970-06-17 | $7700.00 | Window Closed / Lapsed |