Patent US3142028A successfully refreshed from Google Patents.
US3142028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Waveguide stop-band filter utilizing hybrid circuit with lossy resonant cavities in branch arms
Assignee: Raytheon Co
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Filing: 1962-05-31
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Granted: 1964-07-21
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Expires: 1982-05-31
Abstract
No abstract record available.
Inventors
- 👤 Robert D Wanselow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:27
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/20; H01P1/207; H01P1/209
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
A WAVEGUIDE FILTER FOR PROVIDING A STOP-BAND OF PRESELECTED WIDTH FOR ELECTROMAGNETIC ENERGY IN THE VICINITY OF A PRESELECTED FREQUENCY COMPRISING IN COMBINATION: A WAVEGUIDE HYBRID DEVICE FOR PROPAGATING ELECTROMAGNETIC ENERGY BETWEEN AN INPUT PORT AND AN OUTPUT PORT, MEANS DEFINING AT LEAST ONE CAVITY COUPLED TO SAID HYBRID DEVICE, SAID CAVITY BEING RESONANT AT SAID PRESELECTED FREQUENCY, AND LOSS MEANS DISPOSED IN SAID CAVITY FOR ATTENUATING ELECTROMAGNETIC ENERGY IN THE VICINITY OF SAID PRESELECTED FREQUENCY, SAID LOSS MEANS COMPRISING A MIXTURE OF DIELECTRIC AND LOSSY MATERIALS IN A PRESELECTED PROPORTION TO PROVIDE A PRESELECTED CAVITY Q AND A CORRESPONDING PRESELECTED STOP-BAND WIDTH.
Claim 2
Dependent Claim
103 words
A WAVEGUIDE FILTER FOR PROVIDING A STOP-BAND OF PRESELECTED WIDTH FOR ELECTROMAGNETIC ENERGY IN THE VICINITY OF A PRESELECTED FREQUENCY COMPRISING IN COMBINATION: A WAVEGUIDE HYBRID DEVICE FOR PROPAGATING ELECTROMAGNETIC ENERGY BETWEEN AN INPUT PORT AND AN OUTPUT PORT, MEANS DEFINING AT LEAST ONE CAVITY COUPLED TO SAID HYBRID DEVICE, SAID CAVITY BEING RESONANT AT SAID PRESELECTED FREQUENCY, AND LOSS MEANS DISPOSED IN SAID CAVITY FOR ATTENUATING ELECTROMAGNETIC ENERGY IN THE VICINITY OF SAID PRESELECTED FREQUENCY, SAID LOSS MEANS COMPRISING A MIXTURE OF DIELECTRIC AND LOSSY MATERIALS IN A PRESELECTED PROPORTION TO PROVIDE A PRESELECTED CAVITY Q AND A CORRESPONDING PRESELECTED STOP-BAND WIDTH.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-07-21 | 1968-01-20 | 1968-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-21 | 1972-01-20 | 1972-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-21 | 1976-01-20 | 1976-07-21 | $7700.00 | Window Closed / Lapsed |