Patent US2575754A successfully refreshed from Google Patents.
US2575754A
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Stabilized calcium phosphate phosphor
Assignee: General Electric Co
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Filing: 1950-10-26
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Granted: 1951-11-20
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Expires: 1970-10-26
Abstract
No abstract record available.
Inventors
- 👤 Herman C Froelich
- 👤 Joseph M Margolis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:46
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/77; C09K11/7715; C09K11/7723; C09K11/7724
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
A FLUORESCENT COMPOSITION CONSISTING ESSENTIALLY OF CALCIUM ORTHOPHOSPHATE AND MANGANESE AND TRIVALENT CERIUM IN ACTIVATOR PROPORTIONS AND ADDITIVE METAL IN THE INDICATED AMOUNT RELATIVE TO THE CAO IN THE PHOSPHOR AND SELECTED FROM THE GROUP CONSISTING OF ABOUT .01 TO .03 MOLE ZNO, .10 TO .22 MOLE SRO, .01 TO .10 MOLE BAO AND .01 TO .02 MOLE MGO.
Claim 2
Dependent Claim
59 words
A FLUORESCENT COMPOSITION CONSISTING ESSENTIALLY OF CALCIUM ORTHOPHOSPHATE AND MANGANESE AND TRIVALENT CERIUM IN ACTIVATOR PROPORTIONS AND ADDITIVE METAL IN THE INDICATED AMOUNT RELATIVE TO THE CAO IN THE PHOSPHOR AND SELECTED FROM THE GROUP CONSISTING OF ABOUT .01 TO .03 MOLE ZNO, .10 TO .22 MOLE SRO, .01 TO .10 MOLE BAO AND .01 TO .02 MOLE MGO.
References Cited (Backward Citations)
US2241950A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-19 | 1955-05-21 | 1955-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-19 | 1959-05-21 | 1959-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-19 | 1963-05-21 | 1963-11-20 | $7700.00 | Window Closed / Lapsed |