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US3524189A
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Slotted waveguide antenna array providing dual frequency operation
Assignee: United States Department of the Army
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Filing: 1966-11-09
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Granted: 1970-08-11
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Expires: 1986-11-09
Abstract
No abstract record available.
Inventors
- 👤 Howard S Jones Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:00
CPC Classifications
H; H01; H01Q; H01Q21/00; H01Q21/0006; H01Q21/0037; H01Q21/0043; H01Q21/005; H01Q21/0056; H01Q1/00; H01Q1/27; H01Q1/28; H01Q1/281; H01Q5/00; H01Q5/40; H01Q5/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3346865A
Cited
US3369244A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-10 | 1974-02-09 | 1974-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-10 | 1978-02-09 | 1978-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-10 | 1982-02-09 | 1982-08-11 | $7700.00 | Window Closed / Lapsed |