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Patent US3427624A successfully refreshed from Google Patents.
US3427624A
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Low profile antenna having horizontal tunable top loading member
Assignee: Northrop Grumman Corp
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Filing: 1966-07-13
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Granted: 1969-02-11
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Expires: 1986-07-13
Abstract
No abstract record available.
Inventors
- 👤 Robert D Wanselow
- 👤 Dale W Milligan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:05
CPC Classifications
H; H01; H01Q; H01Q9/00; H01Q9/04; H01Q9/06; H01Q9/14; H01Q9/145; H01Q9/30; H01Q9/32; H01Q9/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2166750A
Cited
US2283897A
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US2417793A
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US2431124A
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US2578154A
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US2850732A
Cited
US3151289A
Cited
US3358286A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-11 | 1972-08-12 | 1973-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-11 | 1976-08-12 | 1977-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-11 | 1980-08-12 | 1981-02-11 | $7700.00 | Window Closed / Lapsed |