US3414490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for manufacturing an electroluminescent device
Assignee: Philips North America LLC
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Filing: 1966-02-16
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Granted: 1968-12-03
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Expires: 1986-02-16
Abstract
No abstract record available.
Inventors
- 👤 Jr William A Thornton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:56
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12; H05B33/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
THE METHOD OF PROVIDING AN ALUMINUM OXIDE DIELECTRIC BREAKDOWN LAYER OVER A PARTIALLY COMPLETED ELECTROLUMINESCENT DEVICE, WHEREIN SAID PARTIALLY COMPLETED DEVICE COMPRISES A FIRST ELECTRODE CARRIED BY A SUBSTRATE, AND A SUBSTANTIALLY CONTINUOUS ELECTROLUMINESCENT PHOSPHOR LAYER DISPOSED OVER SAID FIRST ELECTRODE, SAID METHOD COMPRISING THE STEPS OF: FORMING AN ALUMINUM METAL LAYER OVER SAID PHOSPHOR LAYER; EXPOSING SAID ALUMINUM METAL LAYER TO AN ANODIZINGSUPPORTING ELECTROLYTE; ANODIZING SAID ALUMINUM METAL LAYER BY APPLYING AN ANODIZING POTENTIAL ACROSS SAID ELECTROLYTE AND SAID FIRST ELECTRODE TO CAUSE AN ANODIZING ELECTRIC CURRENT TO PASS THROUGH SAID PARTIALLY COMPLETED ELECTRO-
Claim 2
Independent Claim
95 words
THE METHOD OF PROVIDING AN ALUMINUM OXIDE DIELECTRIC BREAKDOWN LAYER OVER A PARTIALLY COMPLETED ELECTROLUMINESCENT DEVICE, WHEREIN SAID PARTIALLY COMPLETED DEVICE COMPRISES A FIRST ELECTRODE CARRIED BY A SUBSTRATE, AND A SUBSTANTIALLY CONTINUOUS ELECTROLUMINESCENT PHOSPHOR LAYER DISPOSED OVER SAID FIRST ELECTRODE, SAID METHOD COMPRISING THE STEPS OF: FORMING AN ALUMINUM METAL LAYER OVER SAID PHOSPHOR LAYER; EXPOSING SAID ALUMINUM METAL LAYER TO AN ANODIZINGSUPPORTING ELECTROLYTE; ANODIZING SAID ALUMINUM METAL LAYER BY APPLYING AN ANODIZING POTENTIAL ACROSS SAID ELECTROLYTE AND SAID FIRST ELECTRODE TO CAUSE AN ANODIZING ELECTRIC CURRENT TO PASS THROUGH SAID PARTIALLY COMPLETED ELECTRO-
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-03 | 1972-06-03 | 1972-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-03 | 1976-06-03 | 1976-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-03 | 1980-06-03 | 1980-12-03 | $7700.00 | Window Closed / Lapsed |