US3289121A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Helical-walled waveguides
Assignee: Alcatel Lucent SAS
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Filing: 1964-06-16
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Granted: 1966-11-29
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Expires: 1984-06-16
Abstract
No abstract record available.
Inventors
- 👤 Comte Georges
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:42
CPC Classifications
H; H01; H01G; H01G7/00; H01G7/02; H01P; H01P3/00; H01P3/12; H01P3/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
CIRCULAR WAVEGUIDE HAVING A HELICAL WALL, COMPRISING A DIELECTRIC SUBSTANCE BETWEEN THE SAID WALL AND AN EXTERNAL METALLIC SCREEN, CHARACTERIZED IN THAT THERE IS INCORPORATED IN THE DIELECTRIC SUBSTANCES AN INSULATING MATERIAL COMPRISING POLAR OR FERROELECTRIC MOLECULES WHICH HAS A RELAXATION EFFECT IN THE FREQUENCY BAND TRANSMITTED BY THE GUIDE SUCH THAT THE ELECTRICAL THICKNESS OF THE DIELECTRIC SUBSTANCE IS CONSTANT OVE SUBSTANTIALLY THE ENTIRE FREQUENCY BAND.
Claim 2
Dependent Claim
67 words
CIRCULAR WAVEGUIDE HAVING A HELICAL WALL, COMPRISING A DIELECTRIC SUBSTANCE BETWEEN THE SAID WALL AND AN EXTERNAL METALLIC SCREEN, CHARACTERIZED IN THAT THERE IS INCORPORATED IN THE DIELECTRIC SUBSTANCES AN INSULATING MATERIAL COMPRISING POLAR OR FERROELECTRIC MOLECULES WHICH HAS A RELAXATION EFFECT IN THE FREQUENCY BAND TRANSMITTED BY THE GUIDE SUCH THAT THE ELECTRICAL THICKNESS OF THE DIELECTRIC SUBSTANCE IS CONSTANT OVE SUBSTANTIALLY THE ENTIRE FREQUENCY BAND.
References Cited (Backward Citations)
US2950454A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-28 | 1970-05-30 | 1970-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-28 | 1974-05-30 | 1974-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-28 | 1978-05-30 | 1978-11-29 | $7700.00 | Window Closed / Lapsed |