Patent US3249945A successfully refreshed from Google Patents.
US3249945A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tunable whip antenna with combined loading coil and shock spring
Assignee: PRODELIN Inc
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Filing: 1962-07-05
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Granted: 1966-05-03
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Expires: 1982-07-05
Abstract
No abstract record available.
Inventors
- 👤 Robert F Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:32
CPC Classifications
H; H01; H01Q; H01Q9/00; H01Q9/04; H01Q9/06; H01Q9/14; H01Q9/145
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
120 words
A WHIP ANTENNA FOR USE ON A VEHICLE FRAME COMPRISING AN EXTENDING RADIATING ELEMENT, A CONDUCTIVE BASE MOUNTED ON SAID FRAME IN SUBSTANTIALLY RIGID AND CONDUCTIVE RELATIONSHIP, SAID FRAME FORMING A FINITE GROUND PLANE FOR SAID ANTENNA, SAID CONDUCTIVE BASE HAVING AN APERTURE EXTENDING THERETHROUGH TO RECEIVE A LEAD-IN CONDUCTOR, RESILIENT COIL MEANS HAVING A PLURALITY OF TURNS OF A RELATIVELY STIFF WIRE TO RESILIENTLY SUPPORT SAID RADIATING ELEMENT AND HAVING A PREDETERMINED INDUCTANCE, ONE END OF SAID COIL MEANS BEING RIGIDLY ATTACHED TO SAID RADIATING ELEMENT AND THE OTHER END BEING RIGIDLY AND CONDUCTIVELY SECURED TO SAID CONDUCTIVE BASE, MEANS TO COUPLE SAID COIL MEANS TO SAID LEAD-IN CONDUCTOR COMPRISING MOVABLE CONDUCTIVE TAP MEANS COUPLED TO SAID COIL MEANS,
References Cited (Backward Citations)
US2498350A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |