US3235870A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Double-reflector antenna with polarization-changing subreflector
Assignee: Hazeltine Research Inc
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Filing: 1961-03-09
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Granted: 1966-02-15
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Expires: 1981-03-09
Abstract
No abstract record available.
Inventors
- 👤 Peter W Hannan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:44
CPC Classifications
H; H01; H01Q; H01Q19/00; H01Q19/10; H01Q19/18; H01Q19/19; H01Q19/195
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
A CASSEGRAIN-TYPE ANTENNA CAPABLE OF RECEIVING AND TRANSMITTING A WAVE OF A PREDETERMINED POLARIZATION COMPRISING: A FEED HAVING A POLARIZATION DIFFERENT FROM SAID PREDETERMINED POLARIZATION; SUBREFLECTOR MEANS COOPERATING WITH SAID FEED FOR REFLECTING AND CHANGING THE POLARIZATION OF AN INCIDENT WAVE; AND A MAIN REFLECTOR POSITIONED BETWEEN SAID FEED AND SUBREFLECTOR MEANS AND HAVING A GRATING WHICH REFLECTS WAVES OF SAID PREDETERMINED POLARIZATION AND PASSES WAVES OF SAID DIFFERENT POLARIZATION.
Claim 2
Dependent Claim
70 words
A CASSEGRAIN-TYPE ANTENNA CAPABLE OF RECEIVING AND TRANSMITTING A WAVE OF A PREDETERMINED POLARIZATION COMPRISING: A FEED HAVING A POLARIZATION DIFFERENT FROM SAID PREDETERMINED POLARIZATION; SUBREFLECTOR MEANS COOPERATING WITH SAID FEED FOR REFLECTING AND CHANGING THE POLARIZATION OF AN INCIDENT WAVE; AND A MAIN REFLECTOR POSITIONED BETWEEN SAID FEED AND SUBREFLECTOR MEANS AND HAVING A GRATING WHICH REFLECTS WAVES OF SAID PREDETERMINED POLARIZATION AND PASSES WAVES OF SAID DIFFERENT POLARIZATION.
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) | 1969-02-14 | 1969-08-16 | 1970-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-14 | 1973-08-16 | 1974-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-14 | 1977-08-16 | 1978-02-15 | $7700.00 | Window Closed / Lapsed |