Patent US2809167A successfully refreshed from Google Patents.
US2809167A
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Divalent tin activated strontium and strontium-barium tetraphos-phate phosphors
Assignee: General Electric Co
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Filing: 1954-09-21
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Granted: 1957-10-08
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Expires: 1974-09-21
Abstract
No abstract record available.
Inventors
- 👤 Alfred H Mckeag
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:11
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/70; C09K11/71
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A FLUORESCENT MATERIAL COMPRISING A MATRIX OF THE GROUP CONSISTING OF STRONTIUM PHOSPHATE HAVING SUBSTANTIALLY THE COMPOSITION REPRESENTED BY THE FORMULA 3SRO.2P2O5 AND SOLID SOLUTIONS THEREOF WITH UP TO 50% BY WEIGHT OF BARIUM PHOSPHATE HAVING SUBSTANTIALLY THE COMPOSITION REPRESENTED BY THE FORMULA 3BAO.2P2O5, AND AN ACTIVATOR PROPORTION OF METAL OF THE GROUP CONSISTING OF DIVALENT TIN AND MIXTURES OF DIVALENT TIN WITH MANGANESE.
Claim 2
Dependent Claim
64 words
A FLUORESCENT MATERIAL COMPRISING A MATRIX OF THE GROUP CONSISTING OF STRONTIUM PHOSPHATE HAVING SUBSTANTIALLY THE COMPOSITION REPRESENTED BY THE FORMULA 3SRO.2P2O5 AND SOLID SOLUTIONS THEREOF WITH UP TO 50% BY WEIGHT OF BARIUM PHOSPHATE HAVING SUBSTANTIALLY THE COMPOSITION REPRESENTED BY THE FORMULA 3BAO.2P2O5, AND AN ACTIVATOR PROPORTION OF METAL OF THE GROUP CONSISTING OF DIVALENT TIN AND MIXTURES OF DIVALENT TIN WITH MANGANESE.
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) | 1960-10-07 | 1961-04-08 | 1961-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-07 | 1965-04-08 | 1965-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-07 | 1969-04-08 | 1969-10-08 | $7700.00 | Window Closed / Lapsed |