US3424934A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroluminescent cell comprising zinc-doped gallium arsenide on one surface of a silicon nitride layer and spaced chromium-gold electrodes on the other surface
Assignee: AT&T Inc
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Filing: 1966-08-10
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Granted: 1969-01-28
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Expires: 1986-08-10
Abstract
No abstract record available.
Inventors
- 👤 Carl N Berglund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:29
CPC Classifications
H; H10; H10H; H10H20/00; H10H20/052; H10W; H10W72/00; H10W72/071; H10W72/075; H10W72/07551; H10W72/07554
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1745175A
Cited
US3258663A
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US3121177A
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US3175116A
Cited
US3267317A
Cited
US3293512A
Cited
US3290569A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-28 | 1972-07-29 | 1973-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-28 | 1976-07-29 | 1977-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-28 | 1980-07-29 | 1981-01-28 | $7700.00 | Window Closed / Lapsed |