US2420672A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Geophysical prospecting
Assignee: Individual
•
Filing: 1939-02-04
•
Granted: 1947-05-20
•
Expires: 1959-02-04
Abstract
No abstract record available.
Inventors
- 👤 Maillet Raymond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:51
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/24; G01V1/245
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2003780A
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US2049724A
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US2167492A
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US2158198A
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US2053841A
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US2376195A
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US2375283A
Cited
US2217806A
Cited
US2193620A
Cited
US2160224A
Cited
US2354420A
Cited
US2207398A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-05-19 | 1950-11-18 | 1951-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-05-19 | 1954-11-18 | 1955-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-05-19 | 1958-11-18 | 1959-05-20 | $7700.00 | Window Closed / Lapsed |