US3422024A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Strontium and barium substituted lanthanum phosphate phosphors
Assignee: Philips North America LLC
•
Filing: 1966-02-03
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Granted: 1969-01-14
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Expires: 1986-02-03
Abstract
No abstract record available.
Inventors
- 👤 William A Mcallister
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:28
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/77; C09K11/7783; C09K11/7795; C09K11/7796
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
A PHOSPHOR COMPOSITION HAVING A MATRIX CONSISTING ESSENTIALLY OF (LANTHANUM, X) PHOSPHATE, WHEREIN X IS AT LEAST ONE METAL OF THE GROUP CONSISTING OF STRONTIUM AND BARIUM, SAID MATRIX IS ACTIVATED BY ONE OF THE GROUP CONSISTING OF EUROPUM AND PLUS LITHIUM, AND THE RATIO OF METALLIC ELEMENTS IN SAID PHOSPHOR TO PHOSPHORUS IN SAID PHOSPHOR FALL WITHIN THE FOLLOWING GRAM-ATOM RANGES: 0.01<EU/P<0.24, 0<LI/P<0.24, 0.05<SR/P<0.875, 0.05<BA/P<0.7 AND (X+LA)/P=1
Claim 2
Dependent Claim
68 words
A PHOSPHOR COMPOSITION HAVING A MATRIX CONSISTING ESSENTIALLY OF (LANTHANUM, X) PHOSPHATE, WHEREIN X IS AT LEAST ONE METAL OF THE GROUP CONSISTING OF STRONTIUM AND BARIUM, SAID MATRIX IS ACTIVATED BY ONE OF THE GROUP CONSISTING OF EUROPUM AND PLUS LITHIUM, AND THE RATIO OF METALLIC ELEMENTS IN SAID PHOSPHOR TO PHOSPHORUS IN SAID PHOSPHOR FALL WITHIN THE FOLLOWING GRAM-ATOM RANGES: 0.01<EU/P<0.24, 0<LI/P<0.24, 0.05<SR/P<0.875, 0.05<BA/P<0.7 AND (X+LA)/P=1
References Cited (Backward Citations)
US3211666A
Cited
FR1419231A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-14 | 1972-07-15 | 1973-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-14 | 1976-07-15 | 1977-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-14 | 1980-07-15 | 1981-01-14 | $7700.00 | Window Closed / Lapsed |