US2668282A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transmitter for radio seismic systems
Assignee: Phillips Petroleum Co
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Filing: 1948-09-20
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Granted: 1954-02-02
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Expires: 1968-09-20
Abstract
No abstract record available.
Inventors
- 👤 Orin C Montgomery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:10
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/22; G01V1/223
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1950406A
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US2237522A
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US2303493A
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US2407308A
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US2457137A
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US2413116A
Cited
US2435903A
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US2609438A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-01 | 1957-08-03 | 1958-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-01 | 1961-08-03 | 1962-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-01 | 1965-08-03 | 1966-02-02 | $7700.00 | Window Closed / Lapsed |