Patent US3243816A successfully refreshed from Google Patents.
US3243816A
Expired / Lapsed
US
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Final approach landing system
Assignee: Sierra Research Corp
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Filing: 1962-06-08
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Granted: 1966-03-29
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Expires: 1982-06-08
Abstract
No abstract record available.
Inventors
- 👤 John P Chisholm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:50
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/88; G01S13/91; G01S13/913; G01S13/93; G01S13/933; G01S13/935; H; H01; H01Q; H01Q3/00; H01Q3/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
A SYSTEM OF RADAR REFLECTORS FOR MARKING THE AZIMUTH POSITION AND SLOPE OF A PREFERRED GLIDE PATH APPROACH TO A RUNWAY, COMPRISING PLURAL SIDE REFLECTORS SPACED IN ROWS ALONG AND MARKING THE LONGITUDINAL SIDES OF THE RUNWAY AND FACING TOWARD SAID APPROACH PATH, AND LENS MEANS LOCATED IN FRONT OF AT LEAST ONE OF THE REFLECTORS LOCATED ADJACENT TO THE INTERSECTION OF THE PREFERRED GLIDE PATH WITH THE RUNWAY AND SAID LENS MEANS IN COMBINATION WITH ITS ASSOCIATED REFLECTOR PROVIDING A COM-
Claim 2
Independent Claim
82 words
A SYSTEM OF RADAR REFLECTORS FOR MARKING THE AZIMUTH POSITION AND SLOPE OF A PREFERRED GLIDE PATH APPROACH TO A RUNWAY, COMPRISING PLURAL SIDE REFLECTORS SPACED IN ROWS ALONG AND MARKING THE LONGITUDINAL SIDES OF THE RUNWAY AND FACING TOWARD SAID APPROACH PATH, AND LENS MEANS LOCATED IN FRONT OF AT LEAST ONE OF THE REFLECTORS LOCATED ADJACENT TO THE INTERSECTION OF THE PREFERRED GLIDE PATH WITH THE RUNWAY AND SAID LENS MEANS IN COMBINATION WITH ITS ASSOCIATED REFLECTOR PROVIDING A COM-
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-28 | 1969-09-27 | 1970-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-28 | 1973-09-27 | 1974-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-28 | 1977-09-27 | 1978-03-29 | $7700.00 | Window Closed / Lapsed |