US3351898A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for monitoring the condition of a marine seismic detector cable
Assignee: Mobil Oil AS
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Filing: 1966-05-27
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Granted: 1967-11-07
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Expires: 1986-05-27
Abstract
No abstract record available.
Inventors
- 👤 Francis M Romberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:45
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/38; G01V13/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
IN SEISMIC EXPLORATION, THE METHOD OF DETECTING THE RIPPING OR TEAR OF A MARINE SEISMIC CABLE WHICH IS BEING TOWED BY A BOAT AND WHICH INCLUDES ELECTRICAL CONDUCTORS WITHIN A NORMALLY WATERTIGHT OUTER SHEATH, SAID METHOD COMPRISING THE STEPS OF: (A) APPLYING A VOLTAGE BETWEEN AT LEAST ONE OF SAID CONDUCTORS AND A GROUNDING POINT IN THE WATER, (B) SENSING FOR THE FLOW OF ELECTRIC CURRENT FROM SAID CONDUCTORS VIA THE WATER TO SAID GROUNDING POINT, AND (C) PROVIDING AN ALARM INDICATION OF THE RIPPING OR TEARING OF SAID OUTER SHEATH WHEN THE SENSED ELECTRIC CURRENT EXCEEDS A PREDETERMINED THRESHOLD LEVEL.
Claim 2
Dependent Claim
101 words
IN SEISMIC EXPLORATION, THE METHOD OF DETECTING THE RIPPING OR TEAR OF A MARINE SEISMIC CABLE WHICH IS BEING TOWED BY A BOAT AND WHICH INCLUDES ELECTRICAL CONDUCTORS WITHIN A NORMALLY WATERTIGHT OUTER SHEATH, SAID METHOD COMPRISING THE STEPS OF: (A) APPLYING A VOLTAGE BETWEEN AT LEAST ONE OF SAID CONDUCTORS AND A GROUNDING POINT IN THE WATER, (B) SENSING FOR THE FLOW OF ELECTRIC CURRENT FROM SAID CONDUCTORS VIA THE WATER TO SAID GROUNDING POINT, AND (C) PROVIDING AN ALARM INDICATION OF THE RIPPING OR TEARING OF SAID OUTER SHEATH WHEN THE SENSED ELECTRIC CURRENT EXCEEDS A PREDETERMINED THRESHOLD LEVEL.
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) | 1970-11-06 | 1971-05-08 | 1971-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-06 | 1975-05-08 | 1975-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-06 | 1979-05-08 | 1979-11-07 | $7700.00 | Window Closed / Lapsed |