Patent US2931974A successfully refreshed from Google Patents.
US2931974A
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Method of geophysical prospecting
Assignee: CROSSLAND LICENSING CORP Ltd
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Filing: 1954-06-30
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Granted: 1960-04-05
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Expires: 1974-06-30
Abstract
No abstract record available.
Inventors
- 👤 George H Mclaughlin
- 👤 Herbert A Harvey
- 👤 William O Cartier
- 👤 William A Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:07
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/02; G01R33/028; G01R33/0283; G01V; G01V3/00; G01V3/08; G01V3/082
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1708386A
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US1803405A
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US1859005A
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US1934079A
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US2108463A
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US2105247A
Cited
US2559586A
Cited
US2664542A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-05 | 1963-10-05 | 1964-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-05 | 1967-10-05 | 1968-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-05 | 1971-10-05 | 1972-04-05 | $7700.00 | Window Closed / Lapsed |