US3700444A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming a cathode ray tube screen
Assignee: GTE Sylvania Inc
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Filing: 1970-02-10
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Granted: 1972-10-24
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Expires: 1990-02-10
Abstract
Abstract A METHOD OF PATTERN FORMING FOR COLOR TELEVISION PICTURE TUBES WHICH COMPRISES COATING THE FACE PANEL OF A TUBE WITH A SLURRY OF A PHOTOSENSITIZED MATERIAL AND PHOSPHOR BY UTILIZING THE FORCE OF GRAVITY AND THEN EXPOSING THE COATED PANEL TO A SUITABLE SOURCE OF RADIATION THROUGH A NEGATIVE AND DEVELOPING TO FORM A PATTERN.
Inventors
- 👤 John J Miller
- 👤 Thaddeus V Rychlewski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:43
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/20; H01J9/22; H01J9/227; H01J9/2271; H01J9/221; H01J9/223; Y; Y10; Y10S; Y10S430/00; Y10S430/136
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |