US2659859A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for aeromagnetic prospecting
Assignee: Individual
•
Filing: 1946-04-05
•
Granted: 1953-11-17
•
Expires: 1966-04-05
Abstract
No abstract record available.
Inventors
- 👤 Carl A Heiland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:58
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/02; G01R33/04; G01V; G01V3/00; G01V3/15; G01V3/165
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1988521A
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US2446939A
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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) | 1956-11-16 | 1957-05-18 | 1957-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-16 | 1961-05-18 | 1961-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-16 | 1965-05-18 | 1965-11-17 | $7700.00 | Window Closed / Lapsed |