Patent US3564552A successfully refreshed from Google Patents.
US3564552A
Expired / Lapsed
US
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Phased array antenna with rainfall drainage channels
Assignee: Raytheon Co
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Filing: 1968-06-28
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Granted: 1971-02-16
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Expires: 1988-06-28
Abstract
Abstract A PHASE ARRAY ANTENNA BEING PROTECTED AGAINST RAINFALL, COMPRISING AN ANTENNA SUPPORT STRUCTURE, A PLURALITY OF RADIATING ELEMENTS EACH BEING RAISED AWAY FROM SAID SUPPORT STRUCTURE A SUFFICIENT DISTANCE TO PERMIT THE MAXIMUM PROJECTED RAINFALL TO FLOW THROUGH THE CHANNELS FORMED BY RAISING THE ELEMENTS, AND, MEANS FOR CONNECTING THE ARRAY ELEMENTS TOGETHER AT THE FRONT EDGES TO SIMULATE THE EXISTANCE OF A CONTINUOUS GROUND PLANE.
Inventors
- 👤 George A Fraizer Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:39
CPC Classifications
H; H01; H01Q; H01Q3/00; H01Q3/26; H01Q3/30; H01Q1/00; H01Q1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |