Patent US3351912A successfully refreshed from Google Patents.
US3136991A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air traffic control system
Assignee: TDK Micronas GmbH
•
Filing: 1960-08-01
•
Granted: 1964-06-09
•
Expires: 1980-08-01
Abstract
No abstract record available.
Inventors
- 👤 Faymoreau Etienne C L De
- 👤 Jean A Baudin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:16
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/74; G01S13/76; G01S13/78; G01S13/785; G01S13/787
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
AN AIR TRAFFIC CONTROL SYSTEM COMPRISING A BEACON AND A PLURALITY OF TRANSPONDERS, ONE CARRIED BY EACH AIRCRAFT SUBJECT TO SAID CONTROL SYSTEM AND ADAPTED TO DETERMINE THE POSITION OF SAID AIRCRAFT FROM SIGNALS TRANSMITTED BY SAID BEACON, MEANS CARRIED BY SAID AIRCRAFT TO TRANSMIT RETURN SIGNALS TO SAID BEACON, MEANS CARRIED BY SAID AIRCRAFT TO MODULATE SAID RETURN SIGNALS WITH SIGNALS INDICATING THE POSITION OF SAID AIRCRAFT WITH RESPECT TO SAID BEACON, SAID BEACON COMPRISING MEANS FOR DETERMINING THE POSITION INFORMATION OF SAID AIRCRAFT FROM SAID SIGNALS TRANSMITTED FROM SAID AIRCRAFT AND FREE FROM THE ERRORS DUE TO PROPAGATION DELAY OF SAID TRANSPONDER SIGNALS,
Claim 2
Dependent Claim
105 words
AN AIR TRAFFIC CONTROL SYSTEM COMPRISING A BEACON AND A PLURALITY OF TRANSPONDERS, ONE CARRIED BY EACH AIRCRAFT SUBJECT TO SAID CONTROL SYSTEM AND ADAPTED TO DETERMINE THE POSITION OF SAID AIRCRAFT FROM SIGNALS TRANSMITTED BY SAID BEACON, MEANS CARRIED BY SAID AIRCRAFT TO TRANSMIT RETURN SIGNALS TO SAID BEACON, MEANS CARRIED BY SAID AIRCRAFT TO MODULATE SAID RETURN SIGNALS WITH SIGNALS INDICATING THE POSITION OF SAID AIRCRAFT WITH RESPECT TO SAID BEACON, SAID BEACON COMPRISING MEANS FOR DETERMINING THE POSITION INFORMATION OF SAID AIRCRAFT FROM SAID SIGNALS TRANSMITTED FROM SAID AIRCRAFT AND FREE FROM THE ERRORS DUE TO PROPAGATION DELAY OF SAID TRANSPONDER SIGNALS,
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) | 1967-06-09 | 1967-12-09 | 1968-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-09 | 1971-12-09 | 1972-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-09 | 1975-12-09 | 1976-06-09 | $7700.00 | Window Closed / Lapsed |