Patent US2704380A successfully refreshed from Google Patents.
US3093758A
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Piezoelectric devices utilizing cadmium sulfide
Assignee: AT&T Inc
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Filing: 1960-04-13
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Granted: 1963-06-11
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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 14:26
CPC Classifications
H; H10; H10N; H10N30/00; H10N30/80; H10N30/85; H10N30/853; H01; H01B; H01B1/00; H01B1/06; H01B1/10; H01G; H01G7/00; H01G7/02; H01G7/025; Y; Y10; Y10T; Y10T29/00; Y10T29/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
A PIEZOELECTRIC DEVICE COMPRISING AT LEAST ONE ELEMENT CONSISTING ESSENTIALLY OF A SINGLE CRYSTAL OF CADMIUM SULFIDE OF A MAXIMUM ROOM TEMPERATURE CONDUCTIVITY OF 10**8 OHM-1 CM.-1 AND MEANS FOR MAKING ELECTRODE CONTACT WITH THE SAID ELEMENT ON TWO FACES.
Claim 2
Dependent Claim
40 words
A PIEZOELECTRIC DEVICE COMPRISING AT LEAST ONE ELEMENT CONSISTING ESSENTIALLY OF A SINGLE CRYSTAL OF CADMIUM SULFIDE OF A MAXIMUM ROOM TEMPERATURE CONDUCTIVITY OF 10**8 OHM-1 CM.-1 AND MEANS FOR MAKING ELECTRODE CONTACT WITH THE SAID ELEMENT ON TWO FACES.
References Cited (Backward Citations)
US2277008A
Cited
US2410825A
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US2434648A
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US2596460A
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US2614144A
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US2584324A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-06-10 | 1966-12-10 | 1967-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-10 | 1970-12-10 | 1971-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-10 | 1974-12-10 | 1975-06-11 | $7700.00 | Window Closed / Lapsed |