US3588760A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semirigid elliptical waveguide
Assignee: Individual
•
Filing: 1967-11-07
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Granted: 1971-06-28
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Expires: 1987-11-07
Abstract
Abstract A FLEXIBLE RADIO FREQUENCY TRANSMISSION LINE OF THE WAVEGUIDE-TYPE CONSISTING OF A WAVEGUIDE STRUCTURE OF SEMIRIGID CONDUCTIVE MATERIAL HAVING A UNIFORM LONGITUDINAL PROFILE WHOSE INTERIOR CROSS SECTION IS DEFINED BY AN ELLIPSE AND WHOSE EXTERIOR CROSS SECTION IS DEFINED BY THE INTERSECTION OF A CIRCLE AND RECTANGLE, THE RECTANGULAR SIDES BEING PARALLEL TO THE MAJOR DIAMETER OF THE ELLIPSE AND TRANSITIONING AT BOTH ENDS INTO SECTORS OF THE CIRCLE.
Inventors
- 👤 Lewis A Bondon
- 👤 David L Bondon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:02
CPC Classifications
H; H01; H01P; H01P3/00; H01P3/12; H01P3/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |