Patent US3121856A successfully refreshed from Google Patents.
US3121856A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sonar system
Assignee: United States Naval Research Laboratory
•
Filing: 1950-06-29
•
Granted: 1964-02-18
•
Expires: 1970-06-29
Abstract
No abstract record available.
Inventors
- 👤 William J Finney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:47
CPC Classifications
G; G01; G01S; G01S15/00; G01S15/02; G01S15/50; G01S15/58; G01S1/00; G01S1/72
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A PULSE ECHO SIGNAL LOCATOR SYSTEM COMPRISING: A TRANSMITTER FOR TRANSMITTING PERIODIC IMPULSES OF A PREDETERMINED FREQUENCY TO REMOTE OBJECTS, A RECEIVER FOR RECEIVING SAID TRANSMITTED IMPULSES AFTER REFLECTION FROM A REMOTE OBJECT, SAID REFLECTED SIGNALS DEVIATING IN FREQUENCY ABOVE OR BELOW SAID PREDETERMINED FREQUENCY IN DEPENDENCY OF THE MOVEMENT OF SAID OBJECT, FREQUENCY RESPONSIVE MEANS FOR SEPARATING SAID RECEIVED REFLECTED SIGNALS IN ACCORDANCE WITH THE FREQUENCY THEREOF, INDICATING MEANS AND MEANS FOR CONNECTING THE OUTPUT OF SAID FREQUENCY RESPONSIVE MEANS TO SAID INDICATING MEANS TO INDICATE RANGE AND DIRECTION OF MOVEMENT OF SAID OBJECT.
Claim 2
Dependent Claim
95 words
A PULSE ECHO SIGNAL LOCATOR SYSTEM COMPRISING: A TRANSMITTER FOR TRANSMITTING PERIODIC IMPULSES OF A PREDETERMINED FREQUENCY TO REMOTE OBJECTS, A RECEIVER FOR RECEIVING SAID TRANSMITTED IMPULSES AFTER REFLECTION FROM A REMOTE OBJECT, SAID REFLECTED SIGNALS DEVIATING IN FREQUENCY ABOVE OR BELOW SAID PREDETERMINED FREQUENCY IN DEPENDENCY OF THE MOVEMENT OF SAID OBJECT, FREQUENCY RESPONSIVE MEANS FOR SEPARATING SAID RECEIVED REFLECTED SIGNALS IN ACCORDANCE WITH THE FREQUENCY THEREOF, INDICATING MEANS AND MEANS FOR CONNECTING THE OUTPUT OF SAID FREQUENCY RESPONSIVE MEANS TO SAID INDICATING MEANS TO INDICATE RANGE AND DIRECTION OF MOVEMENT OF SAID OBJECT.
References Cited (Backward Citations)
US2193361A
Cited
US2422134A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-02-17 | 1967-08-19 | 1968-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-02-17 | 1971-08-19 | 1972-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-02-17 | 1975-08-19 | 1976-02-18 | $7700.00 | Window Closed / Lapsed |