US2619740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aerial navigation aid
Assignee: Individual
•
Filing: 1948-09-24
•
Granted: 1952-12-02
•
Expires: 1968-09-24
Abstract
No abstract record available.
Inventors
- 👤 Hage Rasmus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:42
CPC Classifications
G; G09; G09B; G09B29/00; G09B29/06; Y; Y10; Y10S; Y10S40/00; Y10S40/904
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US459290A
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US646549A
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US853042A
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FR578225A
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GB464804A
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US2119943A
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FR821104A
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GB520865A
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US2386712A
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US2403197A
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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) | 1955-12-02 | 1956-06-02 | 1956-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-02 | 1960-06-02 | 1960-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-02 | 1964-06-02 | 1964-12-02 | $7700.00 | Window Closed / Lapsed |