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Patent US3221330A successfully refreshed from Google Patents.
US3221330A
Expired / Lapsed
US
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Cavity backed log periodical antenna system
Assignee: Collins Radio Co
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Filing: 1961-05-08
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Granted: 1965-11-30
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Expires: 1981-05-08
Abstract
No abstract record available.
Inventors
- 👤 David G Berry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:17
CPC Classifications
H; H01; H01Q; H01Q11/00; H01Q11/02; H01Q11/10; H01Q13/00; H01Q13/10; H01Q13/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
AN ANTENNA SYSTEM COMPRISING A BODY OF CONDUCTIVE MATERIAL HAVING AT LEAST ONE SUBSTANTIALLY PLANAR SURFACE WITH A WEDGE-SHAPED DEPRESSION OF A GENERAL TRIANGULAR CONFIGURATION FORM THEREIN, SAID WEDGE-SHAPED DEPRESSION DEFINED BY THREE WALL SURFACES AND A BOTTOM SURFACE IN SAID BODY, EACH OF SAID THREE WALL SURFACES BEING SUBSTANTIALLY PERPENDICULAR TO THE SAID PLANAR SURFACE OF SAID BODY, SAID BOTTOM SURFACE LYING IN A PLANE WHICH IS SLOPED WITH RESPECT TO SAID PLANAR SURFACE AT A PREDETERMINED ANGLE, A TRIANGULARLY SHAPED LOG PERIODIC ANTENNA ELEMENT HAVING A CENTER CONDUCTIVE BOOM AND BEING POSITIONED
Claim 2
Dependent Claim
94 words
AN ANTENNA SYSTEM COMPRISING A BODY OF CONDUCTIVE MATERIAL HAVING AT LEAST ONE SUBSTANTIALLY PLANAR SURFACE WITH A WEDGE-SHAPED DEPRESSION OF A GENERAL TRIANGULAR CONFIGURATION FORM THEREIN, SAID WEDGE-SHAPED DEPRESSION DEFINED BY THREE WALL SURFACES AND A BOTTOM SURFACE IN SAID BODY, EACH OF SAID THREE WALL SURFACES BEING SUBSTANTIALLY PERPENDICULAR TO THE SAID PLANAR SURFACE OF SAID BODY, SAID BOTTOM SURFACE LYING IN A PLANE WHICH IS SLOPED WITH RESPECT TO SAID PLANAR SURFACE AT A PREDETERMINED ANGLE, A TRIANGULARLY SHAPED LOG PERIODIC ANTENNA ELEMENT HAVING A CENTER CONDUCTIVE BOOM AND BEING POSITIONED
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 |