US3090876A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piezoelectric devices utilizing aluminum nitride
Assignee: AT&T Inc
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Filing: 1960-04-13
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Granted: 1963-05-21
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Expires: 1980-04-13
Abstract
No abstract record available.
Inventors
- 👤 Andrew R Hutson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:07
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/15; H03H9/17; H03H9/30; H03H9/38; H10; H10N; H10N30/00; H10N30/20; H10N30/204; H10N30/2041; H10N30/2042; H10N30/50; Y; Y10; Y10T; Y10T29/00; Y10T29/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
30 words
A PIEZOELECTRIC DEVICE COMPRISING AT LEAST ONE ELEMENT CONSISTING ESSENTIALLY OF A SINGLE CRYSTAL OF ALUMINUM NITRIDE AND MEANS FOR MAKING ELECTRODE CONTACT WITH THE SAID ELEMENT ON TWO FACES.
Claim 2
Dependent Claim
30 words
A PIEZOELECTRIC DEVICE COMPRISING AT LEAST ONE ELEMENT CONSISTING ESSENTIALLY OF A SINGLE CRYSTAL OF ALUMINUM NITRIDE AND MEANS FOR MAKING ELECTRODE CONTACT WITH THE SAID ELEMENT ON TWO FACES.
References Cited (Backward Citations)
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Cited
US2410825A
Cited
US2434648A
Cited
US2596460A
Cited
US2614144A
Cited
US2691738A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-05-20 | 1966-11-19 | 1967-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-20 | 1970-11-19 | 1971-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-20 | 1974-11-19 | 1975-05-21 | $7700.00 | Window Closed / Lapsed |