Patent US2798211A successfully refreshed from Google Patents.
US2798211A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seismic prospecting method and apparatus
Assignee: California Research LLC
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Filing: 1954-04-15
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Granted: 1957-07-02
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Expires: 1974-04-15
Abstract
No abstract record available.
Inventors
- 👤 Neal J Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:23
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
FOR USE IN RECORDING SIGNALS FROM A SEISMIC CABLE WHICH IS ADAPTED TO BE TOWED THROUGH WATER WHILE IN USEE AND REELED ON A DRUM WHEN NOT IN USE, THE CONBINATION COMPRISING A FIRST PLURALITY OF PRESSURE DETECTORS CONNECTED TO THE PRIMARY OF AN IMPEDANCE MATCHING TRANSFORMER, A SECOND PLURALITY OF PRSSURE DETECOTS CONNECTED TO THE PRIMARY OF A SECOND IMPEDANCE MATCHING TRANSFORMER, A PAIR OF CONDUCTORS CONNECTED TO THE SECONDARY OF EACH OF SAID TRANSFORMERS, MEANS CONNECTING SAID PAIR OF CONDUCTORS FROM SAID SECONDARY OF SAID FIRST TRANSFORM-MER TO A RECORDER, MEANS CONNECTING ONE OF SAID CONDUCTORS FORM SAID SECONDARY OF SAID SECOND TRANSFORMER TO SAID RECORDER, MEANS CONNECTING THE OTHER OF SAID CONDUCTORS FROM SAID SECOND TRANSFORMER TO ONE OF SAID CONDUCTORS ON SAID SECONDARY OF SAID FIRST TRANSFORMER AND TO SAID RECORDER.
Claim 2
Dependent Claim
135 words
FOR USE IN RECORDING SIGNALS FROM A SEISMIC CABLE WHICH IS ADAPTED TO BE TOWED THROUGH WATER WHILE IN USEE AND REELED ON A DRUM WHEN NOT IN USE, THE CONBINATION COMPRISING A FIRST PLURALITY OF PRESSURE DETECTORS CONNECTED TO THE PRIMARY OF AN IMPEDANCE MATCHING TRANSFORMER, A SECOND PLURALITY OF PRSSURE DETECOTS CONNECTED TO THE PRIMARY OF A SECOND IMPEDANCE MATCHING TRANSFORMER, A PAIR OF CONDUCTORS CONNECTED TO THE SECONDARY OF EACH OF SAID TRANSFORMERS, MEANS CONNECTING SAID PAIR OF CONDUCTORS FROM SAID SECONDARY OF SAID FIRST TRANSFORM-MER TO A RECORDER, MEANS CONNECTING ONE OF SAID CONDUCTORS FORM SAID SECONDARY OF SAID SECOND TRANSFORMER TO SAID RECORDER, MEANS CONNECTING THE OTHER OF SAID CONDUCTORS FROM SAID SECOND TRANSFORMER TO ONE OF SAID CONDUCTORS ON SAID SECONDARY OF SAID FIRST TRANSFORMER AND TO SAID RECORDER.
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) | 1960-07-01 | 1960-12-31 | 1961-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-01 | 1964-12-31 | 1965-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-01 | 1968-12-31 | 1969-07-02 | $7700.00 | Window Closed / Lapsed |