Patent US2748386A successfully refreshed from Google Patents.
US2748386A
Expired / Lapsed
US
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Antenna systems
Assignee: Individual
•
Filing: 1951-12-04
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Granted: 1956-05-29
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Expires: 1971-12-04
Abstract
No abstract record available.
Inventors
- 👤 Wladimir J Polydoroff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:48
CPC Classifications
H; H01; H01Q; H01Q13/00; H01Q13/20; H01Q13/24; H01Q1/00; H01Q1/36; H01Q1/362
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A COIL ANTENNA COMPRISING AN ELONGATED FERROMAGNETIC ELEMENT HAVING ITS LENGTH TO EFFECTIVE DIAMETER RATIO NOT LESS THAN ABOUT 8 AND NOT MORE THAN ABOUT 100 AND SAID ELEMENT HAVING AN EFFECTIVE PERMEABILITY OF NOT LESS THAN ABOUT 4 AND NOT MORE THAN ABOUT 420, AN AXIALLY ASSOCIATED CONDUCTIVE MEMBER, AND A CONDUCTIVE WINDING SURROUNDING BUT INSULATED FROM SAID FERROMAGNETIC ELEMENT THE TURNS OF SAID WINDING BEING SPACED BETWEEN THEMSELVES AND SPREAD OVER SUBSTANTIALLY THE ENTIRE LENGTH OF SAID ELEMENT THERE BY MATERIALLY TO INCREASE THE ELECTROMAGNETIC RADIATION PICK-UP PROPERTIES OF SAID ANTENNA IN THE SPACE OCCUPIED BY SAID ANTENNA.
Claim 2
Dependent Claim
100 words
A COIL ANTENNA COMPRISING AN ELONGATED FERROMAGNETIC ELEMENT HAVING ITS LENGTH TO EFFECTIVE DIAMETER RATIO NOT LESS THAN ABOUT 8 AND NOT MORE THAN ABOUT 100 AND SAID ELEMENT HAVING AN EFFECTIVE PERMEABILITY OF NOT LESS THAN ABOUT 4 AND NOT MORE THAN ABOUT 420, AN AXIALLY ASSOCIATED CONDUCTIVE MEMBER, AND A CONDUCTIVE WINDING SURROUNDING BUT INSULATED FROM SAID FERROMAGNETIC ELEMENT THE TURNS OF SAID WINDING BEING SPACED BETWEEN THEMSELVES AND SPREAD OVER SUBSTANTIALLY THE ENTIRE LENGTH OF SAID ELEMENT THERE BY MATERIALLY TO INCREASE THE ELECTROMAGNETIC RADIATION PICK-UP PROPERTIES OF SAID ANTENNA IN THE SPACE OCCUPIED BY SAID ANTENNA.
References Cited (Backward Citations)
US1710085A
Cited
FR641575A
Cited
GB430548A
Cited
US2311364A
Cited
US2335969A
Cited
US2438680A
Cited
GB592763A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-29 | 1959-11-28 | 1960-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-29 | 1963-11-28 | 1964-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-29 | 1967-11-28 | 1968-05-29 | $7700.00 | Window Closed / Lapsed |