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US2968807A
Expired / Lapsed
US
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Ferro-magnetic core antenna
Assignee: Telefunken AG
•
Filing: 1958-05-02
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Granted: 1961-01-17
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Expires: 1978-05-02
Abstract
No abstract record available.
Inventors
- 👤 Troost Albert
- 👤 Ziehm Gunter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:51
CPC Classifications
H; H01; H01Q; H01Q7/00; H01Q7/06; H01Q7/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2122893A
Cited
US2206261A
Cited
US2401882A
Cited
GB707142A
Cited
US2702860A
Cited
US2909742A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-01-17 | 1964-07-18 | 1965-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-17 | 1968-07-18 | 1969-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-17 | 1972-07-18 | 1973-01-17 | $7700.00 | Window Closed / Lapsed |