Patent US3413641A successfully refreshed from Google Patents.
US3413641A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual mode antenna
Assignee: AT&T Inc
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Filing: 1966-05-05
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Granted: 1968-11-26
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Expires: 1986-05-05
Abstract
No abstract record available.
Inventors
- 👤 Richard H Turrin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:40
CPC Classifications
H; H01; H01Q; H01Q13/00; H01Q13/02; H01Q13/025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
AN APERTURE TYPE ANTENNA COMPRISING A FIRST HOLLOW CONDUCTIVELY BOUNDED WAVEGUIDE SECTION OF CIRCULAR CROSS SECTION OF DIAMETER D1 HAVING AN INPUT END AND AN OUTPUT END, A SECOND HOLLOW CONDUCTIVELY BOUNDED WAVEGUIDE SECTION OF CIRCULAR CROSS SECTION OF DIAMETER D2 COAXIALLY DISPOSED IN PART WITH RESPECT TO SAID FIRST SECTION AND HAVING AN INPUT END AND AN APERTURE END, SAID OUTPUT END OF SAID FIRST SECTION INCLUDING MODE CONVERSION MEANS COMPRISING A SMOOTH CONICAL TAPER OF ANGLE A AND DIAMETER BETWEEN D1 AND D2
Claim 2
Dependent Claim
85 words
AN APERTURE TYPE ANTENNA COMPRISING A FIRST HOLLOW CONDUCTIVELY BOUNDED WAVEGUIDE SECTION OF CIRCULAR CROSS SECTION OF DIAMETER D1 HAVING AN INPUT END AND AN OUTPUT END, A SECOND HOLLOW CONDUCTIVELY BOUNDED WAVEGUIDE SECTION OF CIRCULAR CROSS SECTION OF DIAMETER D2 COAXIALLY DISPOSED IN PART WITH RESPECT TO SAID FIRST SECTION AND HAVING AN INPUT END AND AN APERTURE END, SAID OUTPUT END OF SAID FIRST SECTION INCLUDING MODE CONVERSION MEANS COMPRISING A SMOOTH CONICAL TAPER OF ANGLE A AND DIAMETER BETWEEN D1 AND D2
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-26 | 1972-05-27 | 1972-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-26 | 1976-05-27 | 1976-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-26 | 1980-05-27 | 1980-11-26 | $7700.00 | Window Closed / Lapsed |