Patent US3683393A successfully refreshed from Google Patents.
US3683393A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Helical dipole antenna
Assignee: ELECTROTEC CORP
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Filing: 1970-07-06
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Granted: 1972-08-08
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Expires: 1990-07-06
Abstract
Abstract An antenna for communication equipment, in which a conductor in the form of a ribbon or strip is helically wound upon a tube or rod which is made of plastic material or the like.
Inventors
- 👤 Aaron C Self
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:16
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/36; H01Q1/362
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
An antenna element for receiving and transmitting radio frequency energy, comprising: an elongate tubular electrically non-conductive support member of fibrous glass material, the support member having a maximum cross-sectional dimension at the central portion thereof and having smaller cross-sectional dimension from the central portion thereof to each end thereof, an elongate strip of ribbon-like electrically conductive material helically arranged upon the outer surface of the support member, the strip of ribbon-like electrically conductive material having spacedapart convolutions extending along the support member, the strip of conductive material having a width dimension which is large compared to its thickness dimension, the strip of electrically conductive material being in two parts, each part extending from the central portion of the support member to one of the ends thereof.
Claim 2
Dependent Claim
126 words
An antenna element for receiving and transmitting radio frequency energy, comprising: an elongate tubular electrically non-conductive support member of fibrous glass material, the support member having a maximum cross-sectional dimension at the central portion thereof and having smaller cross-sectional dimension from the central portion thereof to each end thereof, an elongate strip of ribbon-like electrically conductive material helically arranged upon the outer surface of the support member, the strip of ribbon-like electrically conductive material having spacedapart convolutions extending along the support member, the strip of conductive material having a width dimension which is large compared to its thickness dimension, the strip of electrically conductive material being in two parts, each part extending from the central portion of the support member to one of the ends thereof.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |