US3603792A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Luminescent screen having a separation medium therein
Assignee: Gt & E Sylvania Inc
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Filing: 1968-08-26
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Granted: 1971-09-07
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Expires: 1988-08-26
Abstract
Abstract A plural color cathodoluminescent screen for use in a cathoderay tube wherein at least two layers of light-emitting phosphors have therebetween a separation layer of electrically conductive oxide material that is substantially translucent to electromagnetic radiation and substantially opaque to the penetration of electron beams of predetermined velocity. The screen includes a nucleation to achieve the uniform disposition of an oxidizable metal which when substantially heated forms the metallic oxide of the separation layer.
Inventors
- 👤 Anthony V Gallaro
- 👤 Walter F Kazuk
- 👤 Kenneth Speigel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:32
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/18; H01J29/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
17 words
A luminescent screen separation medium according to Claim 1 wherein said conductive substance comprises cadmium oxide material.
Claim 2
Dependent Claim
24 words
A luminescent screen separation medium according to Claim 2 wherein the thickness of said cadmium oxide layer is in the order to 900 Angstroms.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-06 | 1975-03-08 | 1975-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-06 | 1979-03-08 | 1979-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-06 | 1983-03-08 | 1983-09-07 | $7700.00 | Window Closed / Lapsed |