US3519984A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aircraft landing beacon system
Assignee: Elco Corp
•
Filing: 1967-03-03
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Granted: 1970-07-07
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Expires: 1987-03-03
Abstract
No abstract record available.
Inventors
- 👤 Edward Zychal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:42
CPC Classifications
F; F21; F21V; F21V21/00; F21V21/08; F21V21/0824; B; B64; B64F; B64F1/00; B64F1/18; B64F1/20; H; H05; H05B; H05B41/00; H05B41/14; H05B41/30; H05B41/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-06 | 1974-01-05 | 1974-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-06 | 1978-01-05 | 1978-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-06 | 1982-01-05 | 1982-07-07 | $7700.00 | Window Closed / Lapsed |