US3564322A
Expired / Lapsed
US
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Cathode-ray tube for flying-spot scanning
Assignee: US Philips Corp
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Filing: 1968-04-23
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Granted: 1971-02-16
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Expires: 1988-04-23
Abstract
Abstract A cathode-ray tube for flying-spot scanning devices in which the cathode-ray screen contains as a phosphor a yttrium aluminate activated with trivalent cerium.
Inventors
- 👤 George Blasse
- 👤 Alfred Bril
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:04
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/18; H01J29/20; C; C09; C09K; C09K11/00; C09K11/08; C09K11/77; C09K11/7766; C09K11/7774; Y; Y02; Y02B; Y02B20/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
24 words
The cathode-ray tube of claim 1 wherein the trivalent cerium activated yttrium aluminate is of the formula Y3-xCexA15012 wherein 0.01 < x < 0.20.
Claim 2
Dependent Claim
41 words
The cathode-ray tube of claim 1 wherein the luminescent screen inCludes, in addition to the trivalent cerium activated yttrium aluminate a phosphor having a decay time of less than 10-7 second and an emission in the blue part of the spectrum.
Claim 3
Dependent Claim
21 words
The cathode-ray tube of claim 3 wherein the phosphor having an emission in the blue part of the spectrum is gehlenite.
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) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |