US3444559A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phased array multibeam formation antenna system
Assignee: AT&T Inc
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Filing: 1968-03-04
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Granted: 1969-05-13
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Expires: 1988-03-04
Abstract
No abstract record available.
Inventors
- 👤 William W Mumford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:32
CPC Classifications
H; H01; H01Q; H01Q3/00; H01Q3/44; H01Q3/46; H01Q3/26; H01Q3/30; H01Q3/34; H01Q3/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3406399A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-12 | 1972-11-11 | 1973-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-12 | 1976-11-11 | 1977-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-12 | 1980-11-11 | 1981-05-13 | $7700.00 | Window Closed / Lapsed |