Patent US2982919A successfully refreshed from Google Patents.
US2982919A
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Automatic gain control amplifier and seismic amplifier system
Assignee: Phillips Petroleum Co
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Filing: 1955-03-03
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Granted: 1961-05-02
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Expires: 1975-03-03
Abstract
No abstract record available.
Inventors
- 👤 Orin C Montgomcry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:44
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/24; G01V1/245
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2286106A
Cited
US2554132A
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US2554905A
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US2558954A
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US2529428A
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US2584680A
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US2576892A
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US2633534A
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US2646545A
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US2838742A
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US2723387A
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US2794952A
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US2817716A
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US2764643A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-01 | 1964-10-31 | 1965-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-01 | 1968-10-31 | 1969-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-01 | 1972-10-31 | 1973-05-02 | $7700.00 | Window Closed / Lapsed |