Patent US3268902A successfully refreshed from Google Patents.
US3268902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual frequency microwave aperturetype antenna providing similar radiation pattern on both frequencies
Assignee: AT&T Inc
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Filing: 1963-12-05
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Granted: 1966-08-23
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Expires: 1983-12-05
Abstract
No abstract record available.
Inventors
- 👤 Richard H Turrin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:14
CPC Classifications
H; H01; H01Q; H01Q19/00; H01Q19/10; H01Q19/12; H01Q19/13; H01P; H01P1/00; H01P1/16; H01Q13/00; H01Q13/20; H01Q13/24; H01Q5/00; H01Q5/40; H01Q5/45
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
AN APERTURE-TYPE ANTENNA COMPRISING, IN COMBINATION, A HOLLOW CONDUCTIVELY BOUNDED WAVEGUIDE OF CIRCULAR CROSS SECTION HAVING AN INPUT END AND AN OUTPUT END, MEANS FOR APPLYING ELECTROMAGNETIC WAVE ENERGY OF AT LEAST TWO SEPARATE FREQENCIES TO SAID INPUT END OF SAID GUIDE IN THE TE11 WAVE MODE, MEANS FOR RADIATING WAVE ENERGY FROM SAID OUTPUT END OF SAID GUIDE AT BOTH SAID FREQUENCIES WITH SUBSTANTIALLY THE SAME RADIATION PATTERN, SAID LATTER MEANS COMPRISING A DIELECTRIC ROD COAXIALLY ALIGNED WITH SAID GUIDE AND EXTENDING FROM A POINT WITHIN SAID GUIDE TO BEYON D THE OUTPUT BEND OF SAID GUIDE, MEANS ROD HAVING A DIELECTRIC CONSTANT AND A DIAMETER SUCH THAT SAID GUIDE, OVER THE INTERVAL COEXTENSIVE WITH SAID ROD,
Claim 2
Dependent Claim
118 words
AN APERTURE-TYPE ANTENNA COMPRISING, IN COMBINATION, A HOLLOW CONDUCTIVELY BOUNDED WAVEGUIDE OF CIRCULAR CROSS SECTION HAVING AN INPUT END AND AN OUTPUT END, MEANS FOR APPLYING ELECTROMAGNETIC WAVE ENERGY OF AT LEAST TWO SEPARATE FREQENCIES TO SAID INPUT END OF SAID GUIDE IN THE TE11 WAVE MODE, MEANS FOR RADIATING WAVE ENERGY FROM SAID OUTPUT END OF SAID GUIDE AT BOTH SAID FREQUENCIES WITH SUBSTANTIALLY THE SAME RADIATION PATTERN, SAID LATTER MEANS COMPRISING A DIELECTRIC ROD COAXIALLY ALIGNED WITH SAID GUIDE AND EXTENDING FROM A POINT WITHIN SAID GUIDE TO BEYON D THE OUTPUT BEND OF SAID GUIDE, MEANS ROD HAVING A DIELECTRIC CONSTANT AND A DIAMETER SUCH THAT SAID GUIDE, OVER THE INTERVAL COEXTENSIVE WITH SAID ROD,
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-22 | 1970-02-21 | 1970-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-22 | 1974-02-21 | 1974-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-22 | 1978-02-21 | 1978-08-23 | $7700.00 | Window Closed / Lapsed |