US3623994A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Very short luminescent decay-time phosphor
Assignee: RCA Licensing Corp
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Filing: 1969-10-31
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Granted: 1971-11-30
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Expires: 1989-10-31
Abstract
Abstract A short-decay-time ultraviolet-emitting phosphor consisting essentially of yttrium aluminum oxide activated by cerium. The phosphor may be described by the molecular formula YA103:Ce. The disclosure includes a cathode-ray tube having a viewing screen structure comprised of the new phosphor.
Inventors
- 👤 Martin Robert Royce
- 👤 Joseph Stanley Martin Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:20
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/77; C09K11/7766; C09K11/7774
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
21 words
A composition according to claim 1 consisting essentially of a chemical correspondence of equimolar proportions of yttrium oxide and aluminum oxide.
Claim 2
Dependent Claim
20 words
A composition according to claim 1 wherein said cerium content is 0.0005 to 0.5 mole per mole yttrium aluminum oxide.
Claim 3
Dependent Claim
23 words
A lumiNescence material according to claim 1 having the molecular composition YA1O3:Ce wherein x is in the range of 0.0005 to 0.5 mole.
Claim 4
Dependent Claim
12 words
A luminescent material according to claim 1 having the molecular composition YA1O3:0.005Ce.
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) | 1974-11-29 | 1975-05-31 | 1975-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-29 | 1979-05-31 | 1979-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-29 | 1983-05-31 | 1983-11-30 | $7700.00 | Window Closed / Lapsed |