Patent US2904516A successfully refreshed from Google Patents.
US2904516A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Halophosphate phosphor preparation
Assignee: General Electric Co
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Filing: 1953-07-06
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Granted: 1959-09-15
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Expires: 1973-07-06
Abstract
No abstract record available.
Inventors
- 👤 John F Ross
- 👤 Harold W Sloyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:06
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/0855; C09K11/0861; C09K11/0866
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
THE METHOD OF PREPARING CALCIUM HALOPHOSPHATE PHOSPHOR ACTIVATED BY ANTIMONY AND MANGENENE WHICH COMPRISES PRELIMINARY AND SEPARATELY PREPARING AT TEMPERATURES IN THE APPROXIMATE RANGE OF 800-900* INDIVIDUAL COMPOSITIONS OF CALCIUM HALO APATITE, MANGANESE HALO APATITE AND ANTIMONY HALO APATITE, THE HALOGEN IN EACH SAID COMPOSITION BEING FROM THE GROUP CONSISTING OF FLUORINE AND CHLORINE AND MIXTURES THEREOF, MIXING TOGETHER THE SAID COMPOSITIONS WITH THE MANGANESE AND ANTIMONY IN ACTIVATING PROPORTIONS AND WITH THE TOTAL HALIDE CONTENT IN AN AMOUNT OF ABOUT 0.8 TO 0.95 MOLE PER 6 MOLES OF PO4, AND FIRING THE MIXTURE AT A TEMPERATURE IN THE APPROXIMATELY RANGE OF 1100-1300*C.
Claim 2
Independent Claim
103 words
THE METHOD OF PREPARING CALCIUM HALOPHOSPHATE PHOSPHOR ACTIVATED BY ANTIMONY AND MANGENENE WHICH COMPRISES PRELIMINARY AND SEPARATELY PREPARING AT TEMPERATURES IN THE APPROXIMATE RANGE OF 800-900* INDIVIDUAL COMPOSITIONS OF CALCIUM HALO APATITE, MANGANESE HALO APATITE AND ANTIMONY HALO APATITE, THE HALOGEN IN EACH SAID COMPOSITION BEING FROM THE GROUP CONSISTING OF FLUORINE AND CHLORINE AND MIXTURES THEREOF, MIXING TOGETHER THE SAID COMPOSITIONS WITH THE MANGANESE AND ANTIMONY IN ACTIVATING PROPORTIONS AND WITH THE TOTAL HALIDE CONTENT IN AN AMOUNT OF ABOUT 0.8 TO 0.95 MOLE PER 6 MOLES OF PO4, AND FIRING THE MIXTURE AT A TEMPERATURE IN THE APPROXIMATELY RANGE OF 1100-1300*C.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-14 | 1963-03-16 | 1963-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-14 | 1967-03-16 | 1967-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-14 | 1971-03-16 | 1971-09-15 | $7700.00 | Window Closed / Lapsed |