Patent US2707776A successfully refreshed from Google Patents.
US2707776A
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Magnetron type seismometer
Assignee: Phillips Petroleum Co
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Filing: 1951-03-12
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Granted: 1955-05-03
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Expires: 1971-03-12
Abstract
No abstract record available.
Inventors
- 👤 Charles G Cruzan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:44
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/16; G01V1/18; G01V1/181
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1864214A
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FR798715A
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US2219745A
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US2372056A
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US2338732A
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US2390187A
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US2587481A
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US2476611A
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US2487029A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-05-02 | 1958-11-01 | 1959-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-02 | 1962-11-01 | 1963-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-02 | 1966-11-01 | 1967-05-03 | $7700.00 | Window Closed / Lapsed |