US3667947A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color crt screen exposure method
Assignee: GTE Sylvania Inc
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Filing: 1970-09-04
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Granted: 1972-06-06
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Expires: 1990-09-04
Abstract
Abstract A METHOD FOR LIGHT FORMING A CATHODE RAY TUBE PATTERNED SCREEN UTILIZING UNATTENUASTED RADIANT ENERGY OF THE LIGHT SOURCE. A PHOTOSENSITIVE PHOSPHOR-CONTAINING COATING DISPOSED ON THE SCREEN PANEL IS EXPOSED, THROUGH IN ADJACENTLY POSITIONED NEGATIVE MASK, BY RADIANT ENERGY OF SUBSTANTIALLY CONSTANT INTENSITY FROM A SUBSTANTIALLY UNATTENUATED DIRECT LIGHT SOURCE ORIENTED WITH AN APERTURED LIGHT ENCLOSURE. SINCE THE UTILIZED AREA OF THE LIGHT SOURCE IS SMALLER THAN THE DISCRETE APERTURE AREA, THE LIGHT SOURCE IS MOVED IN A PREDETERMINED MANNER RELATIVE TO THE APERTURE TO EFFECT A SIMULATED LIGHT SOURCE AREA EQUALING THE APERTURE AREA.
Inventors
- 👤 Lefler H Mckee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:27
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/20; H01J9/22; H01J9/227; H01J9/2271; H01J9/2272
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) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |