US2809316A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroluminescent source of light
Assignee: Egyesuelt Izzolampa es Villamossagi Rt
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Filing: 1954-12-17
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Granted: 1957-10-08
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Expires: 1974-12-17
Abstract
No abstract record available.
Inventors
- 👤 Jeges Karoly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:27
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12; H05B33/14; H05B33/145
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
A SOURCE OF LIGHT OF THE ELECTROLUMINESCENT TYPE COMPRISING A BODY CAPABLE OF RADIATING LIGHT UNDER THE DIRECT INFLUENCE OF CURRENT FLOWING THERETHROUGH AND MEANS FOR SUPPLYING CURRENT TO SAID BODY, SAID CURRENT HAVING A VALUE MATERIALLY BELOW THAT NECESSARY TO PRODUCE INCANDESCENCE, SAID BODY CONSISTING OF CRYSTALLINE STANNIC OXIDE HAVING ELECTRICAL CONDUCTANCE.
Claim 2
Dependent Claim
53 words
A SOURCE OF LIGHT OF THE ELECTROLUMINESCENT TYPE COMPRISING A BODY CAPABLE OF RADIATING LIGHT UNDER THE DIRECT INFLUENCE OF CURRENT FLOWING THERETHROUGH AND MEANS FOR SUPPLYING CURRENT TO SAID BODY, SAID CURRENT HAVING A VALUE MATERIALLY BELOW THAT NECESSARY TO PRODUCE INCANDESCENCE, SAID BODY CONSISTING OF CRYSTALLINE STANNIC OXIDE HAVING ELECTRICAL CONDUCTANCE.
References Cited (Backward Citations)
US2254957A
Cited
US2429420A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-07 | 1961-04-08 | 1961-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-07 | 1965-04-08 | 1965-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-07 | 1969-04-08 | 1969-10-08 | $7700.00 | Window Closed / Lapsed |