US3591813A
Expired / Lapsed
US
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Lithium niobate transducers
Assignee: AT&T Inc
•
Filing: 1969-02-28
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Granted: 1971-07-06
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Expires: 1989-02-28
Abstract
Abstract The specification describes ultrasonic transducers made from single crystal lithium niobate. Five crystal orientations are given for which transducer characteristics are especially favorable.
Inventors
- 👤 Gerald A Coquin
- 👤 Allen H Meitzler
- 👤 Arthur W Warner Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:39
CPC Classifications
H; H10; H10N; H10N30/00; H10N30/80; H10N30/85; H10N30/853; H10N30/8542
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
17 words
The single crystal plate of claim 1 having a (yzw) -17* ( + or - 3*) orientation.
Claim 2
Dependent Claim
17 words
The single crystal plate of claim 1 having a (zxl) -54* ( + or - 3*) orientation.
Claim 3
Dependent Claim
17 words
The single crystal plate of claim 1 having a (xyt) 41* ( + or - 3*) orientation.
Claim 4
Dependent Claim
17 words
The single crystal plate of claim 1 having a (xyt) -49* ( + or - 3*) orientation.
Claim 5
Dependent Claim
23 words
A crystal in accordance with claim 1 in combination with means for impressing an electric field across the thickness of the crystal plate.
Claim 6
Dependent Claim
44 words
An ultrasonic device comprising a crystal in accordance with claim 1, means for impressing an electric field across the thickness, and an ultrasonic wave transmission medium in association with the crystal so that elastic waves generated by said crystal propagate through the transmission medium.
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) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |