Patent US3328800A successfully refreshed from Google Patents.
US3328800A
Expired / Lapsed
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Slot antenna utilizing variable standing wave pattern for controlling slot excitation
Assignee: North American Aviation Corp
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Filing: 1964-03-12
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Granted: 1967-06-27
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Expires: 1984-03-12
Abstract
No abstract record available.
Inventors
- 👤 Jerry A Algeo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:41
CPC Classifications
H; H01; H01Q; H01Q25/00; H01Q13/00; H01Q13/20; H01Q21/00; H01Q21/0006; H01Q21/0037; H01Q21/0043; H01Q21/005; H01Q21/24; H01Q21/245
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
68 words
AN ANTENNA COMPRISING AN APERTURED WAVEGUIDE HAVING A FIRST SET OF INCLINED SLOTS, AND A SECOND SET OF INCLINED SLOTS; SWITCHABLE WAVEGUIDE IMPEDANCE MEANS FOR ESTABLISHING A STANDING-WAVE OPERATIVE TO COUPLE TO AN ALTERNATE ONE OF SAID FIRST AND SECOND SETS OF INCLINED SLOTS FOR CAUSING AN ALTERNATE ONE OF SAID SETS OF INCLINED SLOTS TO BE ASSOCIATED WITH A CORRESPONDING ONE OF A FIRST AND SECOND BEAM-PATTERN.
References Cited (Backward Citations)
US2479209A
Cited
US2679590A
Cited
US2764756A
Cited
GB760388A
Cited
US2771605A
Cited
US2982960A
Cited
US3005984A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-06-26 | 1970-12-26 | 1971-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-26 | 1974-12-26 | 1975-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-26 | 1978-12-26 | 1979-06-27 | $7700.00 | Window Closed / Lapsed |