US3788846A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for printing negative tolerance matrix screen structure for a cathode-ray tube
Assignee: RCA Licensing Corp
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Filing: 1971-06-28
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Granted: 1974-01-29
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Expires: 1991-06-28
Abstract
Abstract A LIGHT-ABSORBING MATRIX IS PRODUCED BY UNDER-EXPOSING A FILM OF LIGHT-SENSITIVE MATERIAL BY PROJECTING LIGHT THROUGH AN APERTURED MASK OF THE TUBE INCIDENT ON THE FILM FROM A SMALL-AREA LIGHT SOURCE, DEVELOPING THE UNDEREXPOSED FILM, USING THE DEVELOPED FILM TO PRODUCE A LIGHTABSORBING MATRIX, AND THEN FILLING THE HOLES IN THE MATRIX WITH PHOSPHOR MATERIAL.
Inventors
- 👤 E Mayaud
- 👤 S Pearlman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:56
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/20; H01J9/22; H01J9/227; H01J9/2271; G; G03; G03F; G03F7/00; G03F7/20; G03F7/2045; Y; Y10; Y10S; Y10S430/00; Y10S430/153
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) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |