Patent US3277439A successfully refreshed from Google Patents.
US3277439A
Expired / Lapsed
US
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Automatic switching and transducer control units for seismic weight dropping systems
Assignee: Atlantic Richfield Co
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Filing: 1965-07-30
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Granted: 1966-10-04
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Expires: 1985-07-30
Abstract
No abstract record available.
Inventors
- 👤 Emmet D Riggs
- 👤 Clifford D Dransfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:22
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/24
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
129 words
A FIELD RECORDING A PLAYBACK SYSTEM FOR SEISMIC WEIGHT DROPPING OPERATIONS COMPRISING, (A) AT LEAST ONE SEISOMETER MEANS FOR CONVERTING SEISMIC SIGNALS INTO ELECTRICAL SIGNALS, (B) A FIRST MULTICONTACT SEQUENTIAL SWITCH CONNECTED TO THE OUTPUT OF SAID SEISMOMETER MEANS, (C) A FIRST PLURALITYL OF ELECTROMAGNETIC TRANSDUCERS ELECTRICALLY CONNECTED TO SAID FIRST SWITCH, (D) A FIRST MAGNETIC RECORDING SURFACE ASSOCIATED WITH SAID FIRST TRANSDUCERS, (E) AN ADDITION CIRCUIT ELECTRICALLY CONNECTED TO SAID FIRST TRANSDUCERS, (F) A SECOND MULTICONTACT SEQUENTIAL SWITCH CONNECTED TO THE OUTPUT OF SAID ADDITION CIRCUIT, (G) A SECOND PLURALITY OF ELECTROMAGNETIC TRANSDUCERS ELECTRICALLY CONNECTED TO SAID SECOND SWTICH, (H) A SECOND MAGNETIC RECORDING SURFACE ASSOCIATED WITH SAID SECOND TRANSDUCER, (I) A TRANSDUCER POSITIONING MEANS FOR MECHANICALLY RAISING AND LOWERING SELECTED TRANSDUCERS OF SAID FIRST AND SECOND TRANSDUCERS,
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) | 1969-10-03 | 1970-04-04 | 1970-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-03 | 1974-04-04 | 1974-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-03 | 1978-04-04 | 1978-10-04 | $7700.00 | Window Closed / Lapsed |