US2862888A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing halophosphate phosphors
Assignee: General Electric Co
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Filing: 1956-10-10
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Granted: 1958-12-02
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Expires: 1976-10-10
Abstract
No abstract record available.
Inventors
- 👤 John F Ross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 11:34
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/0855; C09K11/0861; C09K11/0866
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
THE METHOD OF PREPARING A HALOPHOSPHATE PHOSPHOR WHICH COMPRISES PRELIMINARILY PREPARING AT A TEMPERATURE OF ABOUT 800-900* C. CALCIUM CHLOR-APATITE, SUBSTITUTING SAID CALCIUM CHLOR-APATITE IN A RATIO OF ABOUT 1:1 OF CHLORINE FOR THE CHLORIDE INGREDIENT IN A HALOPHOSPATE PHOSPHOR BATCH FORMULA, BLENDING TOGETHER SAID CALCIUM CHLORAPATITE AND THE INGREDIENTS OF SAID FORMULA AND FIRING AT A TEMPERATURE AND FOR A TIME SUFFICIENT TO FORM THE PHOSPHOR.
Claim 2
Independent Claim
67 words
THE METHOD OF PREPARING A HALOPHOSPHATE PHOSPHOR WHICH COMPRISES PRELIMINARILY PREPARING AT A TEMPERATURE OF ABOUT 800-900* C. CALCIUM CHLOR-APATITE, SUBSTITUTING SAID CALCIUM CHLOR-APATITE IN A RATIO OF ABOUT 1:1 OF CHLORINE FOR THE CHLORIDE INGREDIENT IN A HALOPHOSPATE PHOSPHOR BATCH FORMULA, BLENDING TOGETHER SAID CALCIUM CHLORAPATITE AND THE INGREDIENTS OF SAID FORMULA AND FIRING AT A TEMPERATURE AND FOR A TIME SUFFICIENT TO FORM THE PHOSPHOR.
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) | 1961-12-01 | 1962-06-02 | 1962-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-01 | 1966-06-02 | 1966-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-01 | 1970-06-02 | 1970-12-02 | $7700.00 | Window Closed / Lapsed |