Patent US3164659A successfully refreshed from Google Patents.
US3164659A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acoustic system
Assignee: Clevite Corp
•
Filing: 1961-11-16
•
Granted: 1965-01-05
•
Expires: 1981-11-16
Abstract
No abstract record available.
Inventors
- 👤 Bernard W Abrams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:31
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/40; G01S7/4004; G01S7/4008; G01S7/52; G01S7/52004; G06; G06G; G06G7/00; G06G7/48; G06G7/78
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
154 words
IN AN UNDERWATER SIMULATED TARGET ACOUSTIC ECHO REPEATING SYSTEM, A RELATIVELY SMALL UNDERWATER DEVICE INTENDED TO SIMULATE A SUBMARINE, AN ELECTROACOUSTIC RECEIVING TRANSDUCER ON SAID DEVICE, AN ELECTROACOUSTIC SENDING TRANSDUCER ON SAID DEVICE, AND CIRCUIT MEANS ON SAID DEVICE CONNECTED BETWEEN THE RECEIVING TRANSDUCER AND THE SENDING TRANSDUCER AND COMPRISING A HIGH PASS FILTER COUPLED TO THE OUTPUT OF SAID RECEIVING TRANSDUCER FOR PASSING ONLY THOSE SIGNALS RECEIVED BY THE LATTER WHICH ARE ABOVE A PREDETERMINED CUTOFF FREQUENCY, A LOCAL OSCIL LATOR, MEANS FOR HETERODYNING SAID LOCAL OSCILLATOR AGAINST THE SIGNALS PASSED BY SAID HIGH PASS FILTER, A LOW PASS FILTER COUPLED TO THE OUTPUT OF SAID HETERODYNING MEANS AND HAVING A CUTOFF FREQUENCY SUBSTANTIALLY BELOW SAID CUTOFF FREQUENCY OF THE HIGH PASS FILTER, MEANS COUPLING THE OUTPUT OF SAID LOW PASS FILTER TO THE INPUT OF SAID SENDING TRANSDUCER, AND AMPLIFIER MEANS IN THE CIRCUIT BETWEEN SAID RECEIVING TRANSDUCER AND SAID SENDING TRANSDUCER.
Claim 2
Dependent Claim
154 words
IN AN UNDERWATER SIMULATED TARGET ACOUSTIC ECHO REPEATING SYSTEM, A RELATIVELY SMALL UNDERWATER DEVICE INTENDED TO SIMULATE A SUBMARINE, AN ELECTROACOUSTIC RECEIVING TRANSDUCER ON SAID DEVICE, AN ELECTROACOUSTIC SENDING TRANSDUCER ON SAID DEVICE, AND CIRCUIT MEANS ON SAID DEVICE CONNECTED BETWEEN THE RECEIVING TRANSDUCER AND THE SENDING TRANSDUCER AND COMPRISING A HIGH PASS FILTER COUPLED TO THE OUTPUT OF SAID RECEIVING TRANSDUCER FOR PASSING ONLY THOSE SIGNALS RECEIVED BY THE LATTER WHICH ARE ABOVE A PREDETERMINED CUTOFF FREQUENCY, A LOCAL OSCIL LATOR, MEANS FOR HETERODYNING SAID LOCAL OSCILLATOR AGAINST THE SIGNALS PASSED BY SAID HIGH PASS FILTER, A LOW PASS FILTER COUPLED TO THE OUTPUT OF SAID HETERODYNING MEANS AND HAVING A CUTOFF FREQUENCY SUBSTANTIALLY BELOW SAID CUTOFF FREQUENCY OF THE HIGH PASS FILTER, MEANS COUPLING THE OUTPUT OF SAID LOW PASS FILTER TO THE INPUT OF SAID SENDING TRANSDUCER, AND AMPLIFIER MEANS IN THE CIRCUIT BETWEEN SAID RECEIVING TRANSDUCER AND SAID SENDING TRANSDUCER.
References Cited (Backward Citations)
US2017126A
Cited
US2694868A
Cited
US2838850A
Cited
US2710458A
Cited
US2918650A
Cited
US2887671A
Cited
US3076519A
Cited
US3048814A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-01-05 | 1968-07-06 | 1969-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-01-05 | 1972-07-06 | 1973-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-01-05 | 1976-07-06 | 1977-01-05 | $7700.00 | Window Closed / Lapsed |