US3772618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low velocity zero temperature coefficient acoustic surface wave delay line
Assignee: United States Department of the Air Force
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Filing: 1972-12-15
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Granted: 1973-11-13
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Expires: 1992-12-15
Abstract
Abstract An acoustic surface wave delay line having a single crystal tellurium dioxide substrate member the acoustic surface wave propagation surface of which substantially coincides with a plane defined by the Euler angles Lambda 0*, Mu 90*, and Theta 39*.
Inventors
- 👤 A Slobodnik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:42
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/02; H03H9/02535; H03H9/02818; H03H9/02834; H03H9/02543; H03H9/30; H03H9/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3202846A
Cited
US3699482A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |