Patent US3209361A successfully refreshed from Google Patents.
US3209361A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cassegrainian antenna subreflector flange for suppressing ground noise
Assignee: Individual
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Filing: 1963-01-14
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Granted: 1965-09-28
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Expires: 1983-01-14
Abstract
No abstract record available.
Inventors
- 👤 James E Webb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:37
CPC Classifications
H; H01; H01Q; H01Q19/00; H01Q19/02; H01Q19/021; H01Q19/026
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
THE IMPROVEMENT IN A CASSEGRAINIAN ANTENNA HAVING A SUBREFLECTOR WITH A CURVED REFLECTING FACE AND DEFINING A PLANE WITH THE EDGES OF SAID CURVED REFLECTING FACE, SAID IMPROVEMENT COMPRISING A REFLECTING FLANGE EXTENDING RADIALLY FROM THE CURVED REFLECTING FACE AND MAKING AN ANGLE WITH THE PLANE DEFINED BY THE EDGES OF SAID CURVED REFLECTING FACE WHICH IS SMALLER THAN THE ANGLE MADE BY THE PORTION OF THE CURVED REFLECTING FACE NEAR THE EDGE THEREOF WITH SAID PLANE, THE RADIAL LENGTH OF SAID REFLECTING FLANGE BEING ON THE ORDER OF AN INTEGRAL NUMBER OF WAVELENGTHS OF THE FREQUENCY AT WHICH SAID ANTENNA IS USED.
Claim 2
Dependent Claim
103 words
THE IMPROVEMENT IN A CASSEGRAINIAN ANTENNA HAVING A SUBREFLECTOR WITH A CURVED REFLECTING FACE AND DEFINING A PLANE WITH THE EDGES OF SAID CURVED REFLECTING FACE, SAID IMPROVEMENT COMPRISING A REFLECTING FLANGE EXTENDING RADIALLY FROM THE CURVED REFLECTING FACE AND MAKING AN ANGLE WITH THE PLANE DEFINED BY THE EDGES OF SAID CURVED REFLECTING FACE WHICH IS SMALLER THAN THE ANGLE MADE BY THE PORTION OF THE CURVED REFLECTING FACE NEAR THE EDGE THEREOF WITH SAID PLANE, THE RADIAL LENGTH OF SAID REFLECTING FLANGE BEING ON THE ORDER OF AN INTEGRAL NUMBER OF WAVELENGTHS OF THE FREQUENCY AT WHICH SAID ANTENNA IS USED.
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) | 1968-09-27 | 1969-03-29 | 1969-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-27 | 1973-03-29 | 1973-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-27 | 1977-03-29 | 1977-09-28 | $7700.00 | Window Closed / Lapsed |