US3365720A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined hyperbolic and parabolic double reflector
Assignee: KELTEC IND Inc
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Filing: 1961-12-21
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Granted: 1968-01-23
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Expires: 1981-12-21
Abstract
No abstract record available.
Inventors
- 👤 Kenneth S Kelleher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:22
CPC Classifications
H; H01; H01Q; H01Q19/00; H01Q19/10; H01Q19/18; H01Q19/19
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
164 words
A MICROWAVE ANTENNA ASSEMBLY FOR RADIATING MICROWAVES IN AN INTENDED DIRECTION COMPRISING, IN COMBINATION: (A) A FIRST REFLECTOR DEFINING A HYPERBOLIC ARC IN CROSS SECTION; (B) A SECOND REFLECTOR ADJACENT SAID FIRST REFLECTOR AND DEFINING A PARABOLIC ARC IN CROSS SECTION WHOSE FOCUS IS DISPOSED EXTERIORLY OF SAID ASSEMBLY; AND (C) A RADIATION FEED SOURCE DISPOSED FOR RADIATING WAVES TOWARD SAID FIRST REFLECTOR; SAID REFLECTORS TOGETHER DEFINING A RADIATION APERTURE WHICH IS IN A PLANE DISPOSED AT RIGHT ANGLES TO THE INTENDED RADIATION DIRECTION, SAID HYPERBOLIC ARC HAVING THE FOCUS OF SAID PARABOLIC ARC AS ONE FOCAL POINT AND SAID FEED SOURCE AS ANOTHER FOCAL POINT, SAID REFLECTORS BEING ARRANGED SO THAT WAVES FROM SAID SOURCE DIRECTED TOWARD SAID FIRST REFLECTOR ARE REFLECTED TOWARD SAID SECOND REFLECTOR ALONG LINES COINCIDENT WITH IMAGINARY LINES BETWEEN THE FOCUS AND SAID SECOND REFLECTOR, WHEREBY ALL WAVES REFLECTED FROM SAID SECOND REFLECTOR WILL BE DIRECTED IN A DIRECTION AT RIGHT ANGLES TO THE PLANE OF SAID RADIATION APERTURE.
Claim 2
Dependent Claim
164 words
A MICROWAVE ANTENNA ASSEMBLY FOR RADIATING MICROWAVES IN AN INTENDED DIRECTION COMPRISING, IN COMBINATION: (A) A FIRST REFLECTOR DEFINING A HYPERBOLIC ARC IN CROSS SECTION; (B) A SECOND REFLECTOR ADJACENT SAID FIRST REFLECTOR AND DEFINING A PARABOLIC ARC IN CROSS SECTION WHOSE FOCUS IS DISPOSED EXTERIORLY OF SAID ASSEMBLY; AND (C) A RADIATION FEED SOURCE DISPOSED FOR RADIATING WAVES TOWARD SAID FIRST REFLECTOR; SAID REFLECTORS TOGETHER DEFINING A RADIATION APERTURE WHICH IS IN A PLANE DISPOSED AT RIGHT ANGLES TO THE INTENDED RADIATION DIRECTION, SAID HYPERBOLIC ARC HAVING THE FOCUS OF SAID PARABOLIC ARC AS ONE FOCAL POINT AND SAID FEED SOURCE AS ANOTHER FOCAL POINT, SAID REFLECTORS BEING ARRANGED SO THAT WAVES FROM SAID SOURCE DIRECTED TOWARD SAID FIRST REFLECTOR ARE REFLECTED TOWARD SAID SECOND REFLECTOR ALONG LINES COINCIDENT WITH IMAGINARY LINES BETWEEN THE FOCUS AND SAID SECOND REFLECTOR, WHEREBY ALL WAVES REFLECTED FROM SAID SECOND REFLECTOR WILL BE DIRECTED IN A DIRECTION AT RIGHT ANGLES TO THE PLANE OF SAID RADIATION APERTURE.
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) | 1971-01-22 | 1971-07-24 | 1972-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-22 | 1975-07-24 | 1976-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-22 | 1979-07-24 | 1980-01-23 | $7700.00 | Window Closed / Lapsed |