Patent US3267478A successfully refreshed from Google Patents.
US3267478A
Expired / Lapsed
US
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Tunable ferromagnetic rod loop antenna
Assignee: US Philips Corp
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Filing: 1963-01-18
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Granted: 1966-08-16
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Expires: 1983-01-18
Abstract
No abstract record available.
Inventors
- 👤 Schiefer Gerd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:39
CPC Classifications
H; H01; H01Q; H01Q7/00; H01Q7/005; H01Q1/00; H01Q1/12; H01Q1/22; H01Q1/24; H01Q7/06; H01Q7/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A MAGNETIC ANTENNA FOR USE OVER A PREDETERMINED RADIO FREQUENCY BAND COMPRISING AN ELONGATED BODY OF FERROMAGNETIC MATERIAL, A COUPLING WINDING MOUNTED IN MAGNETIC COUPLING ARRANGEMENT WITH SAID BODY, A SLEEVE OF ELECTRICALLY CONDUCTIVE MATERIAL HAVING A LONGITUDINAL GAP AND ARRANGED TO SURROUND SAID COUPLING WINDING AND A SUBSTANTIAL PORTION OF SAID BODY, AND MEANS PROVIDING A TUNING CAPACITANCE BETWEEN THE EDGES OF SAID LONGITUDINAL GAP.
Claim 2
Dependent Claim
66 words
A MAGNETIC ANTENNA FOR USE OVER A PREDETERMINED RADIO FREQUENCY BAND COMPRISING AN ELONGATED BODY OF FERROMAGNETIC MATERIAL, A COUPLING WINDING MOUNTED IN MAGNETIC COUPLING ARRANGEMENT WITH SAID BODY, A SLEEVE OF ELECTRICALLY CONDUCTIVE MATERIAL HAVING A LONGITUDINAL GAP AND ARRANGED TO SURROUND SAID COUPLING WINDING AND A SUBSTANTIAL PORTION OF SAID BODY, AND MEANS PROVIDING A TUNING CAPACITANCE BETWEEN THE EDGES OF SAID LONGITUDINAL GAP.
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) | 1969-08-15 | 1970-02-14 | 1970-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-15 | 1974-02-14 | 1974-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-15 | 1978-02-14 | 1978-08-16 | $7700.00 | Window Closed / Lapsed |