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Patent US4950937A successfully refreshed from Google Patents.
US4950937A
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Method of making a resonator from a boule of lithium tetraborate and resonator so made
Assignee: United States Department of the Navy
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Filing: 1989-09-13
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Granted: 1990-08-21
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Expires: 2009-09-13
Abstract
Abstract An improved resonator is obtained by providing a plate of lithium tetraboe with a doubly rotated orientation of φ≅38° to 42° and θ≅30° to 36° where doubly rotated orientations are described by the IEEE notation widely known in the art as (YXwl)φ/θ.
Inventors
- 👤 Arthur Ballato
- 👤 John A. Kosinski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:47
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/02; H03H9/02007; H03H9/02015
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
67 words
In a resonator including a lapped and polished plate of lithium tetraborate with metallic electrodes deposited on the major surfaces of the plate and the plate mounted in an evacuated sealed enclosure, the improvement of providing the plate with a doubly rotated orientation of φ≅38+ to 42° and θ≅30° to 36° where doubly rotated orientations are described by the IEEE notation widely known in the art as(YXw1)φ/θ.
Claim 2
Dependent Claim
67 words
In a resonator including a lapped and polished plate of lithium tetraborate with metallic electrodes deposited on the major surfaces of the plate and the plate mounted in an evacuated sealed enclosure, the improvement of providing the plate with a doubly rotated orientation of φ≅38+ to 42° and θ≅30° to 36° where doubly rotated orientations are described by the IEEE notation widely known in the art as(YXw1)φ/θ.
Claim 3
Dependent Claim
23 words
In a resonator according to claim 1 the improvement of providing the plate with a doubly rotated orientation of φ≅ 40° and θ≅33°.
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) | 1993-08-20 | 1994-02-19 | 1994-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-20 | 1998-02-19 | 1998-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-20 | 2002-02-19 | 2002-08-21 | $7700.00 | Window Closed / Lapsed |