US3274592A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulse echo moving object locator system
Assignee: Massachusetts Institute of Technology
•
Filing: 1948-10-07
•
Granted: 1966-09-20
•
Expires: 1968-10-07
Abstract
No abstract record available.
Inventors
- 👤 Roger R Crane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:16
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/50; G01S13/52; G01S13/522; G01S13/524
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
A PULSE ECHO MOVING OBJECT LOCATOR SYSTEM COMPRISING A DIRECTIVE ANTENNA ARRAY INCLUDING A PLURALITY OF FEEDS OPERATIVE TO PROVIDE A PLURALITY OF OVERLAPPING ZONES OF RADIATION AND RECEPTION SO DISPOSED TO PRODUCE AT LEAST A PAIR OF EQUAL SIGNAL INTENSITY AXES, A RADIO PULSE TRANSMITTER AND RECEIVER, SAID TRANSMITTER BEING OPERATIVE TO PERIODICALLY EMIT RADIO FREQUENCY PULSES, SWITCHING MEANS FOR SEQUENTIALLY CONNECTING SAID TRANSMITTER AND RECEIVER TO SAID FEEDS IN SUCH MANNER AS TO PERMIT THE RADIATION OF ONE PULSE AND THE RECEPTION OF ECHOES THEREFROM FROM ONE ANTENNA FEED AT A TIME IN SEQUENCE, A MOVING OBJECT DISCRIMINATOR CIRCUIT MEANS OPERATIVE TO CANCEL ECHOES OBTAINED FROM STATIONARY OBJECTS LYING IN ANY PARTICULAR ZONE OF RECEPTION FED BY THE OUTPUT OF SAID RECEIVER, AND MEANS OPERATIVELY CONNECTED TO SAID MOVING OBJECT DISCRIMINATOR CIRCUIT FOR INDICATING THE RECEPTION OF ENERGY REFLECTED FROM MOVING OBJECTS.
Claim 2
Dependent Claim
144 words
A PULSE ECHO MOVING OBJECT LOCATOR SYSTEM COMPRISING A DIRECTIVE ANTENNA ARRAY INCLUDING A PLURALITY OF FEEDS OPERATIVE TO PROVIDE A PLURALITY OF OVERLAPPING ZONES OF RADIATION AND RECEPTION SO DISPOSED TO PRODUCE AT LEAST A PAIR OF EQUAL SIGNAL INTENSITY AXES, A RADIO PULSE TRANSMITTER AND RECEIVER, SAID TRANSMITTER BEING OPERATIVE TO PERIODICALLY EMIT RADIO FREQUENCY PULSES, SWITCHING MEANS FOR SEQUENTIALLY CONNECTING SAID TRANSMITTER AND RECEIVER TO SAID FEEDS IN SUCH MANNER AS TO PERMIT THE RADIATION OF ONE PULSE AND THE RECEPTION OF ECHOES THEREFROM FROM ONE ANTENNA FEED AT A TIME IN SEQUENCE, A MOVING OBJECT DISCRIMINATOR CIRCUIT MEANS OPERATIVE TO CANCEL ECHOES OBTAINED FROM STATIONARY OBJECTS LYING IN ANY PARTICULAR ZONE OF RECEPTION FED BY THE OUTPUT OF SAID RECEIVER, AND MEANS OPERATIVELY CONNECTED TO SAID MOVING OBJECT DISCRIMINATOR CIRCUIT FOR INDICATING THE RECEPTION OF ENERGY REFLECTED FROM MOVING OBJECTS.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-19 | 1970-03-21 | 1970-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-19 | 1974-03-21 | 1974-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-19 | 1978-03-21 | 1978-09-20 | $7700.00 | Window Closed / Lapsed |