US2817599A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of coating phosphor particles
Assignee: RCA Corp
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Filing: 1954-10-25
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Granted: 1957-12-24
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Expires: 1974-10-25
Abstract
No abstract record available.
Inventors
- 👤 Thomas W Edwards
- 👤 Gilmore E Crosby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:05
CPC Classifications
G; G21; G21K; G21K4/00; H; H01; H01J; H01J9/00; H01J9/20; H01J9/22; H01J9/221; H01J9/223; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/256; Y10T428/29; Y10T428/2982
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
A METHOD OF COATING PHOSPHOR PARTICLES SELECTED FROM THE CLASS CONSITING OF ZINC SULPHIDE AND ZINC-CADMIUM SULPHIDE COMPRISING SUSPENDING SAID PHOSPHOR PARTICLES IN AN AQUEOUS SOLUTION CONTAINING A SOLUBLE SILICATE, AND A SOLUBLE MAGNESIUM SALT, ADJUSTING SAID SOLUTION TO PH BETWEEN 10.3 AND 11 ADDING THERETO AN ALKALI METAL BYDROXIDE AND THE DRYING SAID PARTICLES.
Claim 2
Independent Claim
55 words
A METHOD OF COATING PHOSPHOR PARTICLES SELECTED FROM THE CLASS CONSITING OF ZINC SULPHIDE AND ZINC-CADMIUM SULPHIDE COMPRISING SUSPENDING SAID PHOSPHOR PARTICLES IN AN AQUEOUS SOLUTION CONTAINING A SOLUBLE SILICATE, AND A SOLUBLE MAGNESIUM SALT, ADJUSTING SAID SOLUTION TO PH BETWEEN 10.3 AND 11 ADDING THERETO AN ALKALI METAL BYDROXIDE AND THE DRYING SAID PARTICLES.
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) | 1960-12-23 | 1961-06-24 | 1961-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-23 | 1965-06-24 | 1965-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-23 | 1969-06-24 | 1969-12-24 | $7700.00 | Window Closed / Lapsed |