Patent US3308470A successfully refreshed from Google Patents.
US3308470A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tapered ladder log periodic antenna
Assignee: Granger Associates Inc
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Filing: 1964-04-02
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Granted: 1967-03-07
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Expires: 1984-04-02
Abstract
No abstract record available.
Inventors
- 👤 Bell Ross Leon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:48
CPC Classifications
H; H01; H01Q; H01Q11/00; H01Q11/02; H01Q11/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
A BROADBAND ANTENNA COMPRISING AN ANTENNA STRUCTURE EXTENDING OUTWARDLY AND UPWARDLY FROM A VERTEX AND HAVING A PLURALITY OF MUTUALLY SPACED, VERTICALLY DISPOSED SIMILAR FOLDED MONOPOLE RADIATORS, EACH SUCH RADIATOR CONSISTING OF A PAIR OF SPACED PARALLEL ANTENNA WIRES WITH A CONNECTING LOOP PORTION AT THEIR UPPER ENDS, SAID RADIATING ANTENNA WIRES HAVING THEIR LOWER ENDS GROUNDED, THE SAID RADIATORS BEING SUCCESSIVELY ARRANGED IN A PLANE SUCH THAT THE PHYSICAL DIMENSIONS OF THE RADIATORS AND THEIR SPACINGS INCREASE UNIFORMLY AND PROPORTIONALLY WITH INCREASE IN DISTANCE FROM THE VERTEX, A FEED LINE, CAPACITY COUPLING MEMBERS INTERCONNECTING ONE ANTENNA WIRE ONLY OF EACH OF SAID FOLDED RADIATORS TO ONE SIDE OF SAID FEED LINE, THE OTHER SIDE OF SAID FEED LINE BEING GROUNDED SUCH THAT, IN USE, ALTERNATING CURRENTS FLOW FROM SAID ONE SIDE OF SAID
Claim 2
Dependent Claim
134 words
A BROADBAND ANTENNA COMPRISING AN ANTENNA STRUCTURE EXTENDING OUTWARDLY AND UPWARDLY FROM A VERTEX AND HAVING A PLURALITY OF MUTUALLY SPACED, VERTICALLY DISPOSED SIMILAR FOLDED MONOPOLE RADIATORS, EACH SUCH RADIATOR CONSISTING OF A PAIR OF SPACED PARALLEL ANTENNA WIRES WITH A CONNECTING LOOP PORTION AT THEIR UPPER ENDS, SAID RADIATING ANTENNA WIRES HAVING THEIR LOWER ENDS GROUNDED, THE SAID RADIATORS BEING SUCCESSIVELY ARRANGED IN A PLANE SUCH THAT THE PHYSICAL DIMENSIONS OF THE RADIATORS AND THEIR SPACINGS INCREASE UNIFORMLY AND PROPORTIONALLY WITH INCREASE IN DISTANCE FROM THE VERTEX, A FEED LINE, CAPACITY COUPLING MEMBERS INTERCONNECTING ONE ANTENNA WIRE ONLY OF EACH OF SAID FOLDED RADIATORS TO ONE SIDE OF SAID FEED LINE, THE OTHER SIDE OF SAID FEED LINE BEING GROUNDED SUCH THAT, IN USE, ALTERNATING CURRENTS FLOW FROM SAID ONE SIDE OF SAID
References Cited (Backward Citations)
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US3056960A
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US2981951A
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US3101474A
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US3134979A
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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) | 1970-03-06 | 1970-09-05 | 1971-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-06 | 1974-09-05 | 1975-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-06 | 1978-09-05 | 1979-03-07 | $7700.00 | Window Closed / Lapsed |