US3525568A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Airborne electro-optical systems and apparatus for indicating true aircraft velocity and altitude
Assignee: MARC G DREYFUS
•
Filing: 1967-12-11
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Granted: 1970-08-25
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Expires: 1987-12-11
Abstract
No abstract record available.
Inventors
- 👤 Marc G Dreyfus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:35
CPC Classifications
B; B64; B64D; B64D43/00; G; G01; G01C; G01C5/00; G01C5/005; G01P; G01P3/00; G01P3/64; G01P3/80; G01P3/806
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2967449A
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US2882783A
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US2958253A
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US2772479A
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US3057071A
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US3144497A
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US3006235A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-24 | 1974-02-23 | 1974-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-24 | 1978-02-23 | 1978-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-24 | 1982-02-23 | 1982-08-25 | $7700.00 | Window Closed / Lapsed |