Patent US3254264A successfully refreshed from Google Patents.
US3254264A
Expired / Lapsed
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Display devices using piezo-electric transducers
Assignee: MAEHLETT LAB Inc
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Filing: 1961-07-03
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Granted: 1966-05-31
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Expires: 1981-07-03
Abstract
No abstract record available.
Inventors
- 👤 Samuel A Ward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:46
CPC Classifications
H; H05; H05B; H05B33/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
A LUMINESCENT PANEL COMPRISING A CONDUCTIVE LAYER, A PLURALITY OF PIEZOELECTRIC ELEMENTS MOUNTED ON ONE SIDE THEREOF, A SONOLUMINESCENT MEDIUM ON THE OTHER SIDE OF THE LAYER, SAID MEDIUM BEING LUMINESCENT UPON VIBRATION, AND MEANS CAUSING SELECTIVE PIEZOELECTRIC ELEMENTS TO VIBRATE AT THEIR NATURAL FREQUENCY TO PRODUCE LUMINESCENCE
Claim 2
Dependent Claim
48 words
A LUMINESCENT PANEL COMPRISING A CONDUCTIVE LAYER, A PLURALITY OF PIEZOELECTRIC ELEMENTS MOUNTED ON ONE SIDE THEREOF, A SONOLUMINESCENT MEDIUM ON THE OTHER SIDE OF THE LAYER, SAID MEDIUM BEING LUMINESCENT UPON VIBRATION, AND MEANS CAUSING SELECTIVE PIEZOELECTRIC ELEMENTS TO VIBRATE AT THEIR NATURAL FREQUENCY TO PRODUCE LUMINESCENCE
References Cited (Backward Citations)
US2733216A
Cited
US2508098A
Cited
US2895917A
Cited
US2936416A
Cited
US2816236A
Cited
US2995682A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-30 | 1969-11-29 | 1970-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-30 | 1973-11-29 | 1974-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-30 | 1977-11-29 | 1978-05-31 | $7700.00 | Window Closed / Lapsed |