US3153208A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Waveguide filter having nonidentical sections resonant at same fundamental frequency and different harmonic frequencies
Assignee: Individual
•
Filing: 1960-05-06
•
Granted: 1964-10-13
•
Expires: 1980-05-06
Abstract
No abstract record available.
Inventors
- 👤 Henry J Riblet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:49
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/20; H01P1/207; H01P1/208
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
IN A MICROWAVE FILTER OF THE TYPE HAVING A PLURALITY OF DIRECTLY COUPLED WAVEGUIDE SECTIONS AND REFLECTIVE REACTIVE ELEMENTS DISPOSED IN THE WAVEGUIDE CAUSING EACH SECTION TO BE RESONANT AT THE SAME FUNDAMENTAL FREQUENCY, THE IMPROVEMENT OF AN ARRANGEMENT IN WHICH THE SECTIONS ARE NOT ALL SIMULTANEOUSLY RESONANT AT FREQUENCIES HIGHER THAN THE FUNDAMENTAL, THE IMPROVEMENT RESIDING IN EMPLOYING DIRECTLY COUPLED WAVEGUIDE SECTIONS THAT HAVE DIFFERENT CUT-OFF FREQUENCIES AND DIFFERERENT CHARACTERISTIC IMPEDANCES, AND THE LENGTH OF EACH SECTION BEING AN INTEGRAL HALF WAVELENGTH OF
Claim 2
Dependent Claim
84 words
IN A MICROWAVE FILTER OF THE TYPE HAVING A PLURALITY OF DIRECTLY COUPLED WAVEGUIDE SECTIONS AND REFLECTIVE REACTIVE ELEMENTS DISPOSED IN THE WAVEGUIDE CAUSING EACH SECTION TO BE RESONANT AT THE SAME FUNDAMENTAL FREQUENCY, THE IMPROVEMENT OF AN ARRANGEMENT IN WHICH THE SECTIONS ARE NOT ALL SIMULTANEOUSLY RESONANT AT FREQUENCIES HIGHER THAN THE FUNDAMENTAL, THE IMPROVEMENT RESIDING IN EMPLOYING DIRECTLY COUPLED WAVEGUIDE SECTIONS THAT HAVE DIFFERENT CUT-OFF FREQUENCIES AND DIFFERERENT CHARACTERISTIC IMPEDANCES, AND THE LENGTH OF EACH SECTION BEING AN INTEGRAL HALF WAVELENGTH OF
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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) | 1967-10-13 | 1968-04-13 | 1968-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-13 | 1972-04-13 | 1972-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-13 | 1976-04-13 | 1976-10-13 | $7700.00 | Window Closed / Lapsed |