Patent US4523119A successfully refreshed from Google Patents.
US4523119A
Expired / Lapsed
US
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Application of lithium tetraborate to saw devices
Assignee: Marconi UK Intellectual Property Ltd
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Filing: 1984-06-29
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Granted: 1985-06-11
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Expires: 2004-06-29
Abstract
Abstract An electronic device, such as a Surface Wave, Bulk Wave or pyroelectric device, exploiting the polar nature of an active material in which the active material is lithium tetraborate or a closely related compound for example one which is slightly deficient in Lithium or Boron e.g. Li2-/+, S1B4O7 or Li2B4-/+S2O7 where S1 and S2 are small numbers.
Inventors
- 👤 Roger W. Whatmore
- 👤 Iain M. Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:10
CPC Classifications
G; G10; G10K; G10K11/00; G10K11/36; H; H10; H10N; H10N30/00; H10N30/80; H10N30/85; H10N30/853; H10N30/8542
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
33 words
A piezoelectric device which is a surface acoustic wave device in which the active material is lithium tetraborate on X cut Z propogating or an orientation close to X cut or Z propagating.
Claim 2
Dependent Claim
33 words
A piezoelectric device which is a surface acoustic wave device in which the active material is lithium tetraborate on X cut Z propogating or an orientation close to X cut or Z propagating.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-06-10 | 1988-12-10 | 1989-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-10 | 1992-12-10 | 1993-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-10 | 1996-12-10 | 1997-06-11 | $7700.00 | Window Closed / Lapsed |