Patent US3034041A successfully refreshed from Google Patents.
US3034041A
Expired / Lapsed
US
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Feedback amplifying systems
Assignee: Schlumberger Well Surveying Corp
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Filing: 1955-08-17
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Granted: 1962-05-08
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Expires: 1975-08-17
Abstract
No abstract record available.
Inventors
- 👤 Nick A Schaster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:23
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/18; G01V3/20; G01V3/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2343207A
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US2283241A
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US2623955A
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US2713664A
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US2729784A
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US2752571A
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US2817715A
Cited
US2694114A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-05-07 | 1965-11-06 | 1966-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-07 | 1969-11-06 | 1970-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-07 | 1973-11-06 | 1974-05-08 | $7700.00 | Window Closed / Lapsed |