US3383695A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Helical antenna with end distortion to improve polarization purity
Assignee: United States Department of the Navy
•
Filing: 1965-12-22
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Granted: 1968-05-14
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Expires: 1985-12-22
Abstract
No abstract record available.
Inventors
- 👤 Joseph J Jarek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:19
CPC Classifications
H; H01; H01Q; H01Q11/00; H01Q11/02; H01Q11/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
30 words
A HELICAL ANTENNA HAVING IMPROVED CIRCULAR POLARIZATION CHARACTERISTICS COMPRISING: FIRST MEANS FOR PROPAGATING A WAVE HAVING A FIRST POLARIZATION MODE; AND SECOND MEANS FOR CHANGING POLARIZATION COMPONENTS OF SAID WAVE;
Claim 2
Dependent Claim
30 words
A HELICAL ANTENNA HAVING IMPROVED CIRCULAR POLARIZATION CHARACTERISTICS COMPRISING: FIRST MEANS FOR PROPAGATING A WAVE HAVING A FIRST POLARIZATION MODE; AND SECOND MEANS FOR CHANGING POLARIZATION COMPONENTS OF SAID WAVE;
References Cited (Backward Citations)
US2863148A
Cited
US3083364A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-14 | 1971-11-13 | 1972-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-14 | 1975-11-13 | 1976-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-14 | 1979-11-13 | 1980-05-14 | $7700.00 | Window Closed / Lapsed |