US2817783A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroluminescent device
Assignee: GTE Sylvania Inc
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Filing: 1955-07-13
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Granted: 1957-12-24
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Expires: 1975-07-13
Abstract
No abstract record available.
Inventors
- 👤 Egon E Loebner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:21
CPC Classifications
H; H10; H10H; H10H20/00; H10H20/80; H10H20/81
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
AN ELECTROLUMINESCENT DEVICE COMPRISING AN ELECTROLUMINESCENT CRYSTAL HAVING A PORTION IN WHICH THE MAJORITY OF THE CARRIES ARE POSITIVE AND A REGION IN WHICH THE MAJORITY OF THE CARRIERS ARE NEGATIVE SO THAT HOLES CAN BE INJECTED FROM THE POSITIVE REGION INTO THE NEGATIVE REGION, AND MEANS FOR CONTROLLING THE NUMBER OF HOLES PASSING THROUGH THE POSITIVE REGION FOR INJECTION INTO THE NEGETIVE
Claim 2
Dependent Claim
63 words
AN ELECTROLUMINESCENT DEVICE COMPRISING AN ELECTROLUMINESCENT CRYSTAL HAVING A PORTION IN WHICH THE MAJORITY OF THE CARRIES ARE POSITIVE AND A REGION IN WHICH THE MAJORITY OF THE CARRIERS ARE NEGATIVE SO THAT HOLES CAN BE INJECTED FROM THE POSITIVE REGION INTO THE NEGATIVE REGION, AND MEANS FOR CONTROLLING THE NUMBER OF HOLES PASSING THROUGH THE POSITIVE REGION FOR INJECTION INTO THE NEGETIVE
References Cited (Backward Citations)
US2569347A
Cited
US2655625A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-23 | 1961-06-24 | 1961-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-23 | 1965-06-24 | 1965-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-23 | 1969-06-24 | 1969-12-24 | $7700.00 | Window Closed / Lapsed |