Patent US3221331A successfully refreshed from Google Patents.
US3221331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Leaky surface-wave antenna with distributed excitation
Assignee: Thales SA
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Filing: 1962-12-13
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Granted: 1965-11-30
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Expires: 1982-12-13
Abstract
No abstract record available.
Inventors
- 👤 Spitz Erich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:51
CPC Classifications
H; H01; H01Q; H01Q13/00; H01Q13/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
AN ANTENNA FOR RADIATING ULTRA-HIGH FREQUENCY WAVE ENERGY, COMPRISING: AN EXCITATION LINE INCLUDING TWO METALLIC SYMMETRICAL BODIES, SHAPED AS PORTIONS OF A CYLINDER AND SEPARATED BY TWO GAPS, AND MEANS FOR BRINGING SAID BODIES TO ULTRA-HIGH FREQUENCY POTENTIALS IN PHASE OPPOSITION; AND A RADIATING LINE COMPRISING A SLEEVE OF DIELECTRIC MATERIAL SURROUNDING SAID BODIES AND IN CONTACT THEREWITH.
Claim 2
Dependent Claim
58 words
AN ANTENNA FOR RADIATING ULTRA-HIGH FREQUENCY WAVE ENERGY, COMPRISING: AN EXCITATION LINE INCLUDING TWO METALLIC SYMMETRICAL BODIES, SHAPED AS PORTIONS OF A CYLINDER AND SEPARATED BY TWO GAPS, AND MEANS FOR BRINGING SAID BODIES TO ULTRA-HIGH FREQUENCY POTENTIALS IN PHASE OPPOSITION; AND A RADIATING LINE COMPRISING A SLEEVE OF DIELECTRIC MATERIAL SURROUNDING SAID BODIES AND IN CONTACT THEREWITH.
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) | 1968-11-29 | 1969-05-31 | 1969-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-29 | 1973-05-31 | 1973-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-29 | 1977-05-31 | 1977-11-30 | $7700.00 | Window Closed / Lapsed |