Patent US3277490A successfully refreshed from Google Patents.
US3277490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Broadband conical scan feed for parabolic antennas
Assignee: Radiation Inc
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Filing: 1962-12-20
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Granted: 1966-10-04
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Expires: 1982-12-20
Abstract
No abstract record available.
Inventors
- 👤 La Vergne E Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:30
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/06; G01S13/42; G01S13/422; H; H01; H01Q; H01Q3/00; H01Q3/12; H01Q3/16; H01Q3/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A CONICAL SCAN SYSTEM COMPRISING A PARABOLIC REFLECTOR, A STATIONARY ACTIVE FEED POSITIONED APPROXIMATELY AT THE FOCUS OF SAID REFLECTOR AND HAVING AN AXIS COINCIDENT WITH THE AXIS OF SAID REFLECOTR, A PARASITIC ELEMENT ROTATABLE ABOUT SAID FEED AND HAVING AN AXIS INCLINED WITH RESPECT TO THE AXIS OF SAID REFLECTOR, SAID PARASITIC ELEMENT INCLUDING A STRUCTURE RESONANT AT THE FREQUENCY OF THE ACTIVE FEED PATTERN TO ABSORB AND RE-RADIATE ENERGY FROM THE ACTIVE FEED PATTERN, SAID ELEMENT INCLUDING NON-
Claim 2
Dependent Claim
80 words
A CONICAL SCAN SYSTEM COMPRISING A PARABOLIC REFLECTOR, A STATIONARY ACTIVE FEED POSITIONED APPROXIMATELY AT THE FOCUS OF SAID REFLECTOR AND HAVING AN AXIS COINCIDENT WITH THE AXIS OF SAID REFLECOTR, A PARASITIC ELEMENT ROTATABLE ABOUT SAID FEED AND HAVING AN AXIS INCLINED WITH RESPECT TO THE AXIS OF SAID REFLECTOR, SAID PARASITIC ELEMENT INCLUDING A STRUCTURE RESONANT AT THE FREQUENCY OF THE ACTIVE FEED PATTERN TO ABSORB AND RE-RADIATE ENERGY FROM THE ACTIVE FEED PATTERN, SAID ELEMENT INCLUDING NON-
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-03 | 1970-04-04 | 1970-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-03 | 1974-04-04 | 1974-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-03 | 1978-04-04 | 1978-10-04 | $7700.00 | Window Closed / Lapsed |