US3681222A
Expired / Lapsed
US
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Method of producing luminescent screens by the electrophoretic process
Assignee: Corning Glass Works
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Filing: 1970-05-18
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Granted: 1972-08-01
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Expires: 1990-05-18
Abstract
Abstract A METHOD OF PRODUCING LUMINESCENT SURFACES SICH AS THOSE USED IN CATHODE RAY TUBES AND FLUORESCENT LIGHTS IN WHICH THE LUMINESCENT MATERIAL IS ELECTROPHORETICALLY DEPOSITED OVER A THIN FILM OF METALLIC ALUMINUM WHICH HAS BEEN APPLIED TO ONE SURFACE OF A TRANSPARENT SUBSTRATE. THE OPAQUE METALLIC ALUMINUM FILM IS THEN CONVERTED INTO TRANSPARENT ALUMINUM OXIDE WHICH BONDS THE LUMINESCENT MATERIAL TO THE TRANSPARENT SUBSTRATE.
Inventors
- 👤 James A Gupton Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:13
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/02; C03; C03C; C03C17/00; C03C17/34; C03C17/3411; C03C17/3429; C03C17/3494; C25; C25D; C25D13/00; H; H01; H01J; H01J9/00; H01J9/20; H01J9/22; H01J9/221; H01J9/225
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |