Patent US3400340A successfully refreshed from Google Patents.
US3400340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrasonic wave transmission devices
Assignee: AT&T Inc
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Filing: 1964-08-04
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Granted: 1968-09-03
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Expires: 1984-08-04
Abstract
No abstract record available.
Inventors
- 👤 Emmanuel P Papadakis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:44
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/30; H03H9/36; B; B06; B06B; B06B3/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49016
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
AN ULTRASONIC DELAY LINE COMPRISING A DELAY MEDIUM HAVING AN ELECTROMECHANICAL INPUT TRANSDUCER FOR GENERATING AN ULTRASONIC WAVE IN THE DELAY MEDIUM AND AT LEAST ONE ELECTROMECHANICAL OUTPUT TRANSDUCER ATTACHED TO A TRANSMITTING PORTION OF THE DELAY MEDIUM FOR DETECTING SAID WAVE, SAID DELAY MEDIUM COMPRISING AN ELONGATED INTEGRAL MEMBER HAVING A FIRST PORTION OF A PHASE WHICH IS FREELY TRANSMITTING, A SECOND PORTION OF A PHASE WHICH,
Claim 2
Dependent Claim
68 words
AN ULTRASONIC DELAY LINE COMPRISING A DELAY MEDIUM HAVING AN ELECTROMECHANICAL INPUT TRANSDUCER FOR GENERATING AN ULTRASONIC WAVE IN THE DELAY MEDIUM AND AT LEAST ONE ELECTROMECHANICAL OUTPUT TRANSDUCER ATTACHED TO A TRANSMITTING PORTION OF THE DELAY MEDIUM FOR DETECTING SAID WAVE, SAID DELAY MEDIUM COMPRISING AN ELONGATED INTEGRAL MEMBER HAVING A FIRST PORTION OF A PHASE WHICH IS FREELY TRANSMITTING, A SECOND PORTION OF A PHASE WHICH,
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) | 1971-09-03 | 1972-03-04 | 1972-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-03 | 1976-03-04 | 1976-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-03 | 1980-03-04 | 1980-09-03 | $7700.00 | Window Closed / Lapsed |