US2536728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System of position finding by electromagnetic waves
Assignee: Individual
•
Filing: 1941-06-04
•
Granted: 1951-01-02
•
Expires: 1961-06-04
Abstract
No abstract record available.
Inventors
- 👤 Saint-Exupery Antoine De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:05
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/06; G01S13/46
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1965632A
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US1979225A
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US2226929A
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US2225046A
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US2248215A
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US2301929A
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US2405239A
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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) | 1954-01-01 | 1954-07-03 | 1955-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-01 | 1958-07-03 | 1959-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-01 | 1962-07-03 | 1963-01-02 | $7700.00 | Window Closed / Lapsed |