Patent US2687507A successfully refreshed from Google Patents.
US2687507A
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Method and apparatus for measuring the earth's total magnetic field vector
Assignee: Individual
•
Filing: 1950-09-29
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Granted: 1954-08-24
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Expires: 1970-09-29
Abstract
No abstract record available.
Inventors
- 👤 Erick O Schonstedt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:06
CPC Classifications
G; G01; G01C; G01C17/00; G01C17/02; G01C17/28; G01C17/30; G01V; G01V3/00; G01V3/15; G01V3/165
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2488389A
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US2598697A
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US2482504A
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US2559586A
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US2541213A
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US2519718A
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US2534632A
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US2464911A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-23 | 1958-02-22 | 1958-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-23 | 1962-02-22 | 1962-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-23 | 1966-02-22 | 1966-08-24 | $7700.00 | Window Closed / Lapsed |