US3680009A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acoustic surface wave delay line
Assignee: United States Department of the Air Force
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Filing: 1971-03-18
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Granted: 1972-07-25
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Expires: 1991-03-18
Abstract
Abstract An acoustic surface wave delay line having a lithium niobate substrate member the surface wave propagation plane of which is parallel to the lithium niobate crystalline X axis and intersects the crystalline Z and -Y axes. Optimum results are obtained when the intersecting angle of the propagation plane and the Z axis is in the vicinity of 48.5*.
Inventors
- 👤 Andrew J Slobodnik Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:22
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/30; H03H9/42; H03H9/02; H03H9/02535; H03H9/02543; H03H9/02559
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
29 words
A lithium niobate acoustic surface wave delay line as defined in claim 1 wherein the intersecting angle between said propagation surface and said crystalline Z axis is substantially 48.5*.
Claim 2
Dependent Claim
82 words
An acoustic surface wave delay line comprising a single crystal lithium niobate substrate member having a propagation surface adapted to permit the propagation of acoustic surface waves there along, said propagation surface being parallel with the substrate crystalline X axis and intersecting the substrate crystalline Z and -Y axes at 48.5* and 41.5* respectively. an electromagnetic wave to acoustic wave input transducer disposed on said propagation surface, and an acoustic surface wave to electromagnetic wave output transducer disposed on said propagation surface.
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) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |