US2936246A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Burn-resistant phosphors and the method of preparation thereof
Assignee: General Electric Co
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Filing: 1958-03-26
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Granted: 1960-05-10
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Expires: 1978-03-26
Abstract
No abstract record available.
Inventors
- 👤 Henry D Coghill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:38
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/61; C09K11/615
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
THE METHOD OF FORMING A HIGH BRIGHTNESS LONG PERSISTENCY LUMINESCENT SCREEN WHICH EXHIBITS RESISTANCE TO CATHODE RAY BURN WHICH METHOD COMPRISES SUPPORTING A VITREOUS TRANSPARENT SUBSTRATE IN AN EVACUABLE REACTION CHAMBER, HEATING THE SUBSTRATE TO A TEMPERATURE OF 200* C TO 500* C., HEATING THE WALLS OF SAID CHAMBER IN THE VICINTY OF SAID SUBSTRATE, AND VACUUM EVAPORATING A THIN LAYER OF ZINE FLUORIDE TOGETHER WITH AN ACTIVATOR QUANTITY OF A MANGANESE ACTIVATOR UPON THE HEATED SUBSTRATE.
Claim 2
Independent Claim
77 words
THE METHOD OF FORMING A HIGH BRIGHTNESS LONG PERSISTENCY LUMINESCENT SCREEN WHICH EXHIBITS RESISTANCE TO CATHODE RAY BURN WHICH METHOD COMPRISES SUPPORTING A VITREOUS TRANSPARENT SUBSTRATE IN AN EVACUABLE REACTION CHAMBER, HEATING THE SUBSTRATE TO A TEMPERATURE OF 200* C TO 500* C., HEATING THE WALLS OF SAID CHAMBER IN THE VICINTY OF SAID SUBSTRATE, AND VACUUM EVAPORATING A THIN LAYER OF ZINE FLUORIDE TOGETHER WITH AN ACTIVATOR QUANTITY OF A MANGANESE ACTIVATOR UPON THE HEATED SUBSTRATE.
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) | 1963-05-10 | 1963-11-09 | 1964-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-10 | 1967-11-09 | 1968-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-10 | 1971-11-09 | 1972-05-10 | $7700.00 | Window Closed / Lapsed |