Patent US3353181A successfully refreshed from Google Patents.
US3353181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-test circuit for transponder
Assignee: AIRCRAFT RADIO CORP
•
Filing: 1965-12-07
•
Granted: 1967-11-14
•
Expires: 1985-12-07
Abstract
No abstract record available.
Inventors
- 👤 Ernest A Preuss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:52
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/40; G01S7/4052; G01S7/406
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
IN A TRANSPONDER HAVING LOCAL OSCILLATOR MEANS FOR GENERATING A BEATING SIGNAL, SAID OSCILLATOR MEANS INCLUDING A ACTIVE ELEMENT MEANS HAVING AN ANODE, A SELF-TEST CIRCUIT COMPRISING MEANS FOR GENERATING A BASE TIMING SIGNAL OF FIXED DURATION, FIRST MEANS RESPONSIVE TO THE LEADING EDGE OF SAID BASE TIMING SIGNAL FOR GENERATING A FIRST PULSE TIMING SIGNAL, SECOND MEANS RESPONSIVE TO THE LEADING EDGE OF SAID BASE TIMING SIGNAL FOR GENERATING A SECOND PULSE TIMING SIGNAL AT A VARIABLE INTERVAL AFTER THE FIRST, MEANS FOR GENERATING A TEST PULSE OF FIXED DURATION IN RESPONSE TO EACH OF SAID PULSE TIMING SIGNALS, THE FIXED DURATION BEING LESS IN TIME THAN THE VARIABLE DELAY BETWEEN SAID PULSE TIMING SIGNALS,
Claim 2
Dependent Claim
116 words
IN A TRANSPONDER HAVING LOCAL OSCILLATOR MEANS FOR GENERATING A BEATING SIGNAL, SAID OSCILLATOR MEANS INCLUDING A ACTIVE ELEMENT MEANS HAVING AN ANODE, A SELF-TEST CIRCUIT COMPRISING MEANS FOR GENERATING A BASE TIMING SIGNAL OF FIXED DURATION, FIRST MEANS RESPONSIVE TO THE LEADING EDGE OF SAID BASE TIMING SIGNAL FOR GENERATING A FIRST PULSE TIMING SIGNAL, SECOND MEANS RESPONSIVE TO THE LEADING EDGE OF SAID BASE TIMING SIGNAL FOR GENERATING A SECOND PULSE TIMING SIGNAL AT A VARIABLE INTERVAL AFTER THE FIRST, MEANS FOR GENERATING A TEST PULSE OF FIXED DURATION IN RESPONSE TO EACH OF SAID PULSE TIMING SIGNALS, THE FIXED DURATION BEING LESS IN TIME THAN THE VARIABLE DELAY BETWEEN SAID PULSE TIMING 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) | 1970-11-13 | 1971-05-15 | 1971-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-13 | 1975-05-15 | 1975-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-13 | 1979-05-15 | 1979-11-14 | $7700.00 | Window Closed / Lapsed |