US3271704A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrasonic delay device
Assignee: AT&T Inc
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Filing: 1963-03-25
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Granted: 1966-09-06
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Expires: 1983-03-25
Abstract
No abstract record available.
Inventors
- 👤 Arthur H Fitch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:04
CPC Classifications
H; H03; H03K; H03K5/00; H03K5/01; H03K5/04; H03K5/06; H03K5/13; H03K5/14
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
142 words
IN COMBINATION, AN ULTRASONIC DELAY LINE HAVING A PARAMETER THAT DETERMINES THE CUT-OFF FREQUENCY OF THE SECOND LONGITUDINAL MODE OF ULTRASONIC WAVE PROPAGATION THEREIN, MEANS FOR APPLYING AN ULTRASONIC WAVE INCLUDING COMPONENTS OF THE FIRST AND SECOND LONGITUDINAL MODES TO A FIRST PORTION OF SAID LINE, SAID PARAMETER IN SAID FIRST PORTION DETERMINING A CUT-OFF FREQUENCY FOR SAID SECOND MODE THEREIN THAT IS BELOW THE LOWEST FREQUENCY COMPONENT IN SAID WAVE, SAID PARAMETER IN A SECOND PORTION OF SAID LINE DETERMINING A CUT-OFF FREQUENCY FOR SAID SECOND MODE THEREIN THAT IS ABOVE THE HIGHEST FREQUENCY COMPONENT IN SAID WAVE, SAID FIRST PORTION HAVING A LENGTH WHICH IS FUNCTION OF A PREDETERMINED DELAY CHARACTERISTIC UNIQUE TO SAID SECOND LONGITUDINAL MODE WHICH CHARACTERISTIC IS TO BE INTRODUCED TO SAID APPLIED ULTRASONIC WAVE, AND MEANS COUPLED TO SAID SECOND PORTION FOR DAMPING WAVE MOTION THEREIN.
References Cited (Backward Citations)
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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) | 1969-09-05 | 1970-03-07 | 1970-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-05 | 1974-03-07 | 1974-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-05 | 1978-03-07 | 1978-09-06 | $7700.00 | Window Closed / Lapsed |