US3493294A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Retrodirective modulator
Assignee: National Aeronautics and Space Administration
•
Filing: 1967-08-07
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Granted: 1970-02-03
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Expires: 1987-08-07
Abstract
No abstract record available.
Inventors
- 👤 Michael W Fitzmaurice
- 👤 Peter O Minott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:50
CPC Classifications
G; G02; G02B; G02B17/00; G02B17/08; G02B17/0884; G02B17/0888; G02B26/00; G02B26/08; G02B26/0816; G02B5/00; G02B5/12; G02B5/126; H; H01; H01Q; H01Q3/00; H01Q3/44; H04; H04B; H04B10/00; H04B10/25; H04B10/2587
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3110812A
Cited
US3363196A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-02 | 1973-08-04 | 1974-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-02 | 1977-08-04 | 1978-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-02 | 1981-08-04 | 1982-02-03 | $7700.00 | Window Closed / Lapsed |