Patent US4039980A successfully refreshed from Google Patents.
Patent US2988690A successfully refreshed from Google Patents.
US2988690A
Expired / Lapsed
US
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Method and apparatus for geophysical exploration
Assignee: Newmont Corp
•
Filing: 1956-08-17
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Granted: 1961-06-13
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Expires: 1976-08-17
Abstract
No abstract record available.
Inventors
- 👤 Love Allan Walter
- 👤 Baldwin Robert Wilkes
- 👤 Brant Arthur Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:07
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/02; G01V3/06
Claims Analysis
Total Claims: 0
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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) | 1964-06-12 | 1964-12-12 | 1965-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-12 | 1968-12-12 | 1969-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-12 | 1972-12-12 | 1973-06-13 | $7700.00 | Window Closed / Lapsed |