US3179941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Helical antenna with adjustable length by switching
Assignee: Dynascan Corp
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Filing: 1962-08-17
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Granted: 1965-04-20
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Expires: 1982-08-17
Abstract
No abstract record available.
Inventors
- 👤 Edward F Harris
- 👤 James W Hart
- 👤 Clifford E Raimen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:19
CPC Classifications
H; H01; H01Q; H01Q11/00; H01Q11/02; H01Q11/08; H01Q9/00; H01Q9/04; H01Q9/06; H01Q9/14
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
142 words
A MULTIFREQUENCY ANTENNA COMPRISING IN COMBINATION: A BASE; AN ANTENNA CONDUCTOR INSULATED FROM THE BASE AND EXTENDING THEREFROM TO DEFINE AT LEAST IN PART AN ELONGATED ENVELOPE WITH AN END REMOTE FROM THE BASE; A SHEET-LIKE CONDUCTOR EXTENDING ALONGSIDE THE ENVELOPE SUBSTANTIALLY FROM THE BASE AND AT LEAST PART OF THE DISTANCE TO SAID END OF THE ENVELOPE, SAID SHEET-LIKE CONDUCTOR HAVING AT LEAST ONE WINDOW REMOTE FROM THE BASE AND BEING ELECTRICALLY CONNECTED TO THE ANTENNA CONDUCTOR ADJACENT THE BASE, THE SHEET-LIKE CONDUCTOR EXTENDING PARTIALLY ABOUT THE PERIPHERY OF THE ENVELOPE; AND A CONDUCTOR EXTENDING FROM THE ANTENNA CONDUCTOR ADJACENT THE WINDOW THROUGH THE SAID WINDOW IN INSULATED RELATION THEREWITH; AND MEANS DISPOSED ON THE SIDE OF THE SHEET-LIKE CONDUCTOR OUTBOARD THE ANTENNA CONDUCTOR AND ADJACENT THE WINDOW AND EFFECTIVE AT WILL TO CONNECT SAID LAST CONDUCTOR TO THE SHEET-LIKE CONDUCTOR.
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) | 1968-04-19 | 1968-10-19 | 1969-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-19 | 1972-10-19 | 1973-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-19 | 1976-10-19 | 1977-04-20 | $7700.00 | Window Closed / Lapsed |