US3331068A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aircraft identifier
Assignee: International Standard Electric Corp
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Filing: 1941-07-10
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Granted: 1967-07-11
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Expires: 1961-07-10
Abstract
No abstract record available.
Inventors
- 👤 Henri G Busignies
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:41
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/74; G01S13/76; G01S13/78
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
IN AN AIRCRAFT INDENTIFICATION SYSTEM, RECEIVER MEANS RESPONSIVE TO RELATIVELY WIDE BAND OF FREQUENCIES, IMPLUSE GENERATING MEANS RESPONSIVE TO IMPLUSE ENERGY DETECTED BY SAID RECEIVER, SAID IMPULSE GENERATING MEANS INCLUDING DELAY MEANS FOR TIME DELAYING IMPLUSES DETECTED BY SAID RECEIVER, AND MEANS SUPERIMPOSING DETECTED IMPULSE ENERGY UPON IMPLUSE ENERGY DELAYED BY SAID DELAY MEANS, SAID DELAYED IMPULSE ENERGY BEING OF A POLARITY SENSE OPPOSITE TO THAT OF THE IMPLUSE ENERGY SUPERIMPOSED THEREON, AND TRANSMITTER MEANS INCLUDING MEANS MODULATED BY ENERGY RESULTING FROM SUCH SUPERPOSITION.
Claim 2
Dependent Claim
106 words
IN AN AIRCRAFT IDENTIFICATION SYSTEM, RECEIVER MEANS RESPONSIVE TO RELATIVELY WIDE BAND OF FREQUENCIES, FIRST TIME DELAY MEANS COUPLED TO THE OUTPUT OF SAID RECEIVER, POLARITY INVERTING MEANS HAVING AN INPUT COUPLED TO THE OUTPUT OF SAID DELAY MEANS, THERSHOLD LIMITING MEANS HAVING AN INPUT COUPLED TO THE OUTPUTS OF SAID RECEIVER AND OF SAID INVERTING MEANS, TRANSMITTER MEANS INCLUDING MODULATOR MEANS, SECOND TIME DELAY MEANS COUPLED BETWEEN THE OUTPUT OF SAID LIMITING MEANS AND SAID MODULATOR MEANS, SAID THERSHOLD MEANS ADAPTED TO ELIMINATE UNDESIRED NEGATIVE COMPONENTS OF THE ENERGY APPLIED TO THE INPUT THEREOF WHEREBY THE RESULTANT ENERGY IS CAUSED TO CONTROL SAID MODULATOR MEANS.
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) | 1970-07-10 | 1971-01-09 | 1971-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-10 | 1975-01-09 | 1975-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-10 | 1979-01-09 | 1979-07-11 | $7700.00 | Window Closed / Lapsed |