US2615848A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing magnesium arsenate phosphor activated by manganese
Assignee: General Electric Co
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Filing: 1951-10-16
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Granted: 1952-10-28
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Expires: 1971-10-16
Abstract
No abstract record available.
Inventors
- 👤 Wells Robert Stirling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:56
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/74
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
IN THE METHOF OF PREPARING A LUMINESCENT MATERIAL BY HEATING AT A TEMPERATURE OF ABOUT 1150* C. COMPOUNDS OF MAGNESIUM, ARSENIC AND MANGANESE IN PROPORTIONS TO FURNISH MAGNESIUM OXIDE AND ARSENIC PENTOXIDE IN A MOL RATIO BETWEEN ABOUT 8:1 AND 10:1 AND MANGANESE IN AN AMOUNT OF ABOUT 0.001 TO 5 MOL PERCENT OF THE MAGNESIUM OXIDE, THE IMPROVEMENT WHICH COMPRISES EMPLOYING AS THE MAGNESIUM COMPOUND A MATERIAL OF THE GROUP CONSISTING OF MAGNESIUM PEROXIDE AND MIXTURES OF MAGNESIUM PEROXIDE AND MAGNESIUM OXIDE CONTAINING AT LEAST ABOUT 25% MAGNESIUM PEROXIDE, AND FIRING THE MIXTURE FOR ABOUT TWO TO FIVE HOURS.
Claim 2
Dependent Claim
100 words
IN THE METHOF OF PREPARING A LUMINESCENT MATERIAL BY HEATING AT A TEMPERATURE OF ABOUT 1150* C. COMPOUNDS OF MAGNESIUM, ARSENIC AND MANGANESE IN PROPORTIONS TO FURNISH MAGNESIUM OXIDE AND ARSENIC PENTOXIDE IN A MOL RATIO BETWEEN ABOUT 8:1 AND 10:1 AND MANGANESE IN AN AMOUNT OF ABOUT 0.001 TO 5 MOL PERCENT OF THE MAGNESIUM OXIDE, THE IMPROVEMENT WHICH COMPRISES EMPLOYING AS THE MAGNESIUM COMPOUND A MATERIAL OF THE GROUP CONSISTING OF MAGNESIUM PEROXIDE AND MIXTURES OF MAGNESIUM PEROXIDE AND MAGNESIUM OXIDE CONTAINING AT LEAST ABOUT 25% MAGNESIUM PEROXIDE, AND FIRING THE MIXTURE FOR ABOUT TWO TO FIVE HOURS.
References Cited (Backward Citations)
GB628308A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-10-28 | 1956-04-28 | 1956-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-28 | 1960-04-28 | 1960-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-28 | 1964-04-28 | 1964-10-28 | $7700.00 | Window Closed / Lapsed |