Patent US3174146A successfully refreshed from Google Patents.
US3174146A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic landing systems
Assignee: Bell Aerospace Corp
•
Filing: 1962-10-12
•
Granted: 1965-03-16
•
Expires: 1982-10-12
Abstract
No abstract record available.
Inventors
- 👤 Franklin B Bossler
- 👤 Johannes G Goerner
- 👤 Frederick D Powell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:03
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/88; G01S13/91; G01S13/913
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
IN AN AIRCRAFT LANDING SYSTEM, A RADAR-COMPUTER MEANS COMBINATION FOR ESTABLISHING A SPACE-STABILIZED GLIDE SLOPE FOR AIRCRAFT, SAID COMPUTER MEANS HAVING A PITCH COMMAND OUTPUT INCLUDING A TERM PROPORTIONAL TO THE ALTITUDE ERROR DETERMINED BY THE DIFFERENCE BETWEEN THE RADARMEASURED AIRCRAFT ALTITUDE AND THE THEORETICALLY CORRECT ALTITUDE AS DETERMINED BY A PREDETERMINED GLIDESLOPE PATH, A TERM PROPORTIONAL TO THE DERIVATIVE, WITH RESPECT TO TIME, OF SAID ALTITUDE ERROR, AND A TERM PROPORTIONAL TO THE INTEGRAL, WITH RESPECT TO TIME, OF SAID ALTITUDE ERROR.
Claim 2
Dependent Claim
83 words
IN AN AIRCRAFT LANDING SYSTEM, A RADAR-COMPUTER MEANS COMBINATION FOR ESTABLISHING A SPACE-STABILIZED GLIDE SLOPE FOR AIRCRAFT, SAID COMPUTER MEANS HAVING A PITCH COMMAND OUTPUT INCLUDING A TERM PROPORTIONAL TO THE ALTITUDE ERROR DETERMINED BY THE DIFFERENCE BETWEEN THE RADARMEASURED AIRCRAFT ALTITUDE AND THE THEORETICALLY CORRECT ALTITUDE AS DETERMINED BY A PREDETERMINED GLIDESLOPE PATH, A TERM PROPORTIONAL TO THE DERIVATIVE, WITH RESPECT TO TIME, OF SAID ALTITUDE ERROR, AND A TERM PROPORTIONAL TO THE INTEGRAL, WITH RESPECT TO TIME, OF SAID ALTITUDE ERROR.
References Cited (Backward Citations)
US2459482A
Cited
US3131018A
Cited
US2741760A
Cited
US2996706A
Cited
US3018959A
Cited
US3053487A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-15 | 1968-09-14 | 1969-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-15 | 1972-09-14 | 1973-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-15 | 1976-09-14 | 1977-03-16 | $7700.00 | Window Closed / Lapsed |