US3235869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface wave antenna
Assignee: Raytheon Co
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Filing: 1956-08-15
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Granted: 1966-02-15
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Expires: 1976-08-15
Abstract
No abstract record available.
Inventors
- 👤 Lester C Van Atta
- 👤 Morris J Ehrlich
- 👤 Robert S Wehner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:00
CPC Classifications
H; H01; H01Q; H01Q13/00; H01Q13/20; H01Q13/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
168 words
A SURFACE WAVE ANTENNA COMPRISING: A PILLBOX TYPE ANTENNA HAVING A 180 DEGREE REFLECTOR BEND A LOWER PLATE FASTENED TO THE LOWER EDGE OF SAID BEND, AND AN UPPER PLATE IN PARALLEL RELATION TO SAID LOWER PLATE FASTENED TO THE UPPER EDGE OF SAID BEND, SAID BEND HAVING A PARABOLIC CROSS SECTION IN A PLANE PARALLEL TO SAID PLATES; A SEPTUM PLATE SUPPORTED IN PARALLEL RELATION BETWEEN SAID UPPER AND SAID LOWER PLATE AND EXTENDING OUT OF SAID PILLBOX TYPE OF ANTENNA, THE SPACE BETWEEN SAID LOWER PLATE AND SAID SEPTUM PLATE DEFINING A LOWER PARALLEL-PLATE TRANSMISSION LINE AND THE SPACE BETWEEN SAID UPPER PLATE AND THE ASSOCIATED SURFACE OF SAID SEPTUM PLATE DEFINING AN UPPER PARALLEL-PLATE TRANSMISSION LINE, A SELECTED PORTION OF SAID SEPTUM PLATE WITHIN SAID UPPER PARALLEL PLATE TRANSMISSION LINE INCLUDING CORRUGATIONS FOR PROPAGATING A SURFACE WAVE; AND AN OPEN-ENDED WAVEGUIDE FEED, SAID FEED COUPLED TO SAID LOWER PARALLEL-PLATE TRANSMISSION LINE AND THE OPEN END OF SAID FEED FACING THE INNER SURFACE OF SAID BEND.
Claim 2
Dependent Claim
168 words
A SURFACE WAVE ANTENNA COMPRISING: A PILLBOX TYPE ANTENNA HAVING A 180 DEGREE REFLECTOR BEND A LOWER PLATE FASTENED TO THE LOWER EDGE OF SAID BEND, AND AN UPPER PLATE IN PARALLEL RELATION TO SAID LOWER PLATE FASTENED TO THE UPPER EDGE OF SAID BEND, SAID BEND HAVING A PARABOLIC CROSS SECTION IN A PLANE PARALLEL TO SAID PLATES; A SEPTUM PLATE SUPPORTED IN PARALLEL RELATION BETWEEN SAID UPPER AND SAID LOWER PLATE AND EXTENDING OUT OF SAID PILLBOX TYPE OF ANTENNA, THE SPACE BETWEEN SAID LOWER PLATE AND SAID SEPTUM PLATE DEFINING A LOWER PARALLEL-PLATE TRANSMISSION LINE AND THE SPACE BETWEEN SAID UPPER PLATE AND THE ASSOCIATED SURFACE OF SAID SEPTUM PLATE DEFINING AN UPPER PARALLEL-PLATE TRANSMISSION LINE, A SELECTED PORTION OF SAID SEPTUM PLATE WITHIN SAID UPPER PARALLEL PLATE TRANSMISSION LINE INCLUDING CORRUGATIONS FOR PROPAGATING A SURFACE WAVE; AND AN OPEN-ENDED WAVEGUIDE FEED, SAID FEED COUPLED TO SAID LOWER PARALLEL-PLATE TRANSMISSION LINE AND THE OPEN END OF SAID FEED FACING THE INNER SURFACE OF SAID BEND.
References Cited (Backward Citations)
US2767396A
Cited
US2690508A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-14 | 1969-08-16 | 1970-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-14 | 1973-08-16 | 1974-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-14 | 1977-08-16 | 1978-02-15 | $7700.00 | Window Closed / Lapsed |