US3681223A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophoretic deposition of color phosphors
Assignee: Corning Glass Works
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Filing: 1970-07-27
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Granted: 1972-08-01
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Expires: 1990-07-27
Abstract
Abstract COLOR PHOSPHORS ARE ELECTROPHORETICALLY DEPOSITED ON A CATHODE RAY TUBE FACEPLATE. FIRST, A PLURALITY OF CONDUCTIVE DOT PATTERNS ARE DEPOSITED ON THE FACEPLATE, ONE PATTERN FOR EACH COLOR OF PHOSPHOR DOTS TO BE DEPOSITED. EACH PATTERN INCLUDES LANDS OF MATERIAL ON WHICH THE DOTS ARE TO BE DEPOSITED AND CONDUCTIVE PATHS INTERCONNECTING THE LANDS. THE CONDUCTIVE PATTERN IS DEPOSITED WITH A SINGLE MASKING OPERATION. THE DIFFERENT COLOR PHOSPHORS ARE THEN SUCCESSIVELY DEPOSITED ON THE DOTS BY ELECTROPHORESIS, ONE COLOR PHOSPHOR BEING DEPOSITED ON EACH CONDUCTIVE PATTERN.
Inventors
- 👤 James A Gupton Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:39
CPC Classifications
C; 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 |