US3126175A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lowell
Assignee: —
•
Filing: —
•
Granted: 1964-03-24
•
Expires: 1981-03-24
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:15
CPC Classifications
G; G05; G05D; G05D1/00; G05D1/04; G05D1/06; G05D1/0607; G05D1/0653; G05D1/0676
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
IN APPARATUS FOR GUIDING AN AIRCRAFT TO A LANDING, (A) MEANS FOR PROVIDING A SIGNAL REPRESENTATIVE OF THE INSTANTANEOUS ALTITUDE OF SAID AIRCRAFT ABOVE GROUND LEVEL, (B) VARIABLE LIMITING MEANS RESPONSIVE TO THE ALTITUDE SIGNAL FOR LIMITING THE OUTPUT THEREOF IN EXCESS OF A PREDETERMINED VALUE, AND (C) BIASING MEANS RESPONSIVE TO SAID ALTITUDE SIGNAL FOR VARYING THE BIAS ON SAID LIMITING MEANS TO VARY THE LIMIT THEREOF AS A FUNCTION OF SAID ALTITUDE SIGNAL.
Claim 2
Dependent Claim
75 words
IN APPARATUS FOR GUIDING AN AIRCRAFT TO A LANDING, (A) MEANS FOR PROVIDING A SIGNAL REPRESENTATIVE OF THE INSTANTANEOUS ALTITUDE OF SAID AIRCRAFT ABOVE GROUND LEVEL, (B) VARIABLE LIMITING MEANS RESPONSIVE TO THE ALTITUDE SIGNAL FOR LIMITING THE OUTPUT THEREOF IN EXCESS OF A PREDETERMINED VALUE, AND (C) BIASING MEANS RESPONSIVE TO SAID ALTITUDE SIGNAL FOR VARYING THE BIAS ON SAID LIMITING MEANS TO VARY THE LIMIT THEREOF AS A FUNCTION OF SAID ALTITUDE SIGNAL.
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) | 1967-03-24 | 1967-09-23 | 1968-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-24 | 1971-09-23 | 1972-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-24 | 1975-09-23 | 1976-03-24 | $7700.00 | Window Closed / Lapsed |