Patent US3271771A successfully refreshed from Google Patents.
US3271771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Double-reflector, double-feed antenna for crossed polarizations and polarization changing devices useful therein
Assignee: Hazeltine Research Inc
•
Filing: 1962-02-15
•
Granted: 1966-09-06
•
Expires: 1982-02-15
Abstract
No abstract record available.
Inventors
- 👤 Peter W Hannan
- 👤 Harold A Wheeler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:42
CPC Classifications
H; H01; H01Q; H01Q19/00; H01Q19/10; H01Q19/18; H01Q19/19; H01Q19/195
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A DOUBLE-REFLECTOR DOUBLE-FEED ANTENNA FOR RADIATING SIGNALS OF A FIRST CIRCULAR POLARIZATION AND RECEIVING RETURN SIGNALS WHICH HAVE UNDERGONE CIRCULAR POLARIZATION REVERSING ACTION IN REFLECTION FROM AN OBJECT COMPRISING: A MAIN REFLECTOR; SUBREFLECTOR MEANS COOPERATING WITH SAID MAIN REFLECTOR WHICH IS SUBSTANTIALLY TRANSPARENT FOR WAVES OF A FIRST CIRCULAR POLARIZATION AND WHICH REFLECTS WAVES OF THE OPPOSITE CIRCULAR POLARIZATION; A FIRST FEED FOR WAVES OF SAID FIRST POLARIZATION COOPERATING WITH SAID MAIN REFLECTOR SUBSTANTIALLY INDEPENDENTLY OF SAID SUBREFLECTOR MEANS; AND A SECOND FEED FOR WAVES OF SAID OPPOSITE POLARIZATION COOPERATING WITH THE COMBINATION OF SAID MAIN REFLECTOR AND SUBREFLECTOR MEANS.
Claim 2
Dependent Claim
100 words
A DOUBLE-REFLECTOR DOUBLE-FEED ANTENNA FOR RADIATING SIGNALS OF A FIRST CIRCULAR POLARIZATION AND RECEIVING RETURN SIGNALS WHICH HAVE UNDERGONE CIRCULAR POLARIZATION REVERSING ACTION IN REFLECTION FROM AN OBJECT COMPRISING: A MAIN REFLECTOR; SUBREFLECTOR MEANS COOPERATING WITH SAID MAIN REFLECTOR WHICH IS SUBSTANTIALLY TRANSPARENT FOR WAVES OF A FIRST CIRCULAR POLARIZATION AND WHICH REFLECTS WAVES OF THE OPPOSITE CIRCULAR POLARIZATION; A FIRST FEED FOR WAVES OF SAID FIRST POLARIZATION COOPERATING WITH SAID MAIN REFLECTOR SUBSTANTIALLY INDEPENDENTLY OF SAID SUBREFLECTOR MEANS; AND A SECOND FEED FOR WAVES OF SAID OPPOSITE POLARIZATION COOPERATING WITH THE COMBINATION OF SAID MAIN REFLECTOR AND SUBREFLECTOR MEANS.
References Cited (Backward Citations)
CA562602A
Cited
US1938066A
Cited
US2814724A
Cited
US2788440A
Cited
US2930039A
Cited
US3137000A
Cited
US3195137A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-05 | 1970-03-07 | 1970-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-05 | 1974-03-07 | 1974-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-05 | 1978-03-07 | 1978-09-06 | $7700.00 | Window Closed / Lapsed |